Initial import.

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diff --git a/chromium/ipc/ipc_message_macros.h b/chromium/ipc/ipc_message_macros.h
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+++ b/chromium/ipc/ipc_message_macros.h
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+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Defining IPC Messages
+//
+// Your IPC messages will be defined by macros inside of an XXX_messages.h
+// header file.  Most of the time, the system can automatically generate all
+// of messaging mechanism from these definitions, but sometimes some manual
+// coding is required.  In these cases, you will also have an XXX_messages.cc
+// implemation file as well.
+//
+// The senders of your messages will include your XXX_messages.h file to
+// get the full set of definitions they need to send your messages.
+//
+// Each XXX_messages.h file must be registered with the IPC system.  This
+// requires adding two things:
+//   - An XXXMsgStart value to the IPCMessageStart enum in ipc_message_start.h
+//   - An inclusion of XXX_messages.h file in a message generator .h file
+//
+// The XXXMsgStart value is an enumeration that ensures uniqueness for
+// each different message file.  Later, you will use this inside your
+// XXX_messages.h file before invoking message declaration macros:
+//     #define IPC_MESSAGE_START XXXMsgStart
+//       ( ... your macro invocations go here ... )
+//
+// Message Generator Files
+//
+// A message generator .h header file pulls in all other message-declaring
+// headers for a given component.  It is included by a message generator
+// .cc file, which is where all the generated code will wind up.  Typically,
+// you will use an existing generator (e.g. common_message_generator.cc
+// in /chrome/common), but there are circumstances where you may add a
+// new one.
+//
+// In the rare cicrucmstances where you can't re-use an existing file,
+// your YYY_message_generator.cc file for a component YYY would contain
+// the following code:
+//     // Get basic type definitions.
+//     #define IPC_MESSAGE_IMPL
+//     #include "path/to/YYY_message_generator.h"
+//     // Generate constructors.
+//     #include "ipc/struct_constructor_macros.h"
+//     #include "path/to/YYY_message_generator.h"
+//     // Generate destructors.
+//     #include "ipc/struct_destructor_macros.h"
+//     #include "path/to/YYY_message_generator.h"
+//     // Generate param traits write methods.
+//     #include "ipc/param_traits_write_macros.h"
+//     namespace IPC {
+//     #include "path/to/YYY_message_generator.h"
+//     }  // namespace IPC
+//     // Generate param traits read methods.
+//     #include "ipc/param_traits_read_macros.h"
+//     namespace IPC {
+//     #include "path/to/YYY_message_generator.h"
+//     }  // namespace IPC
+//     // Generate param traits log methods.
+//     #include "ipc/param_traits_log_macros.h"
+//     namespace IPC {
+//     #include "path/to/YYY_message_generator.h"
+//     }  // namespace IPC
+//
+// In cases where manual generation is required, in your XXX_messages.cc
+// file, put the following after all the includes for param types:
+//     #define IPC_MESSAGE_IMPL
+//     #include "XXX_messages.h"
+//        (... implementation of traits not auto-generated ...)
+//
+// Multiple Inclusion
+//
+// The XXX_messages.h file will be multiply-included by the
+// YYY_message_generator.cc file, so your XXX_messages file can't be
+// guarded in the usual manner.  Ideally, there will be no need for any
+// inclusion guard, since the XXX_messages.h file should consist soley
+// of inclusions of other headers (which are self-guarding) and IPC
+// macros (which are multiply evaluating).
+//
+// Note that #pragma once cannot be used here; doing so would mark the whole
+// file as being singly-included.  Since your XXX_messages.h file is only
+// partially-guarded, care must be taken to ensure that it is only included
+// by other .cc files (and the YYY_message_generator.h file).  Including an
+// XXX_messages.h file in some other .h file may result in duplicate
+// declarations and a compilation failure.
+//
+// Type Declarations
+//
+// It is generally a bad idea to have type definitions in a XXX_messages.h
+// file; most likely the typedef will then be used in the message, as opposed
+// to the struct iself.  Later, an IPC message dispatcher wil need to call
+// a function taking that type, and that function is declared in some other
+// header.  Thus, in order to get the type definition, the other header
+// would have to include the XXX_messages.h file, violating the rule above
+// about not including XXX_messages.h file in other .h files.
+//
+// One approach here is to move these type definitions to another (guarded)
+// .h file and include this second .h in your XXX_messages.h file.  This
+// is still less than ideal, because the dispatched function would have to
+// redeclare the typedef or include this second header.  This may be
+// reasonable in a few cases.
+//
+// Failing all of the above, then you will want to bracket the smallest
+// possible section of your XXX_messages.h file containing these types
+// with an include guard macro.  Be aware that providing an incomplete
+// class type declaration to avoid pulling in a long chain of headers is
+// acceptable when your XXX_messages.h header is being included by the
+// message sending caller's code, but not when the YYY_message_generator.c
+// is building the messages. In addtion, due to the multiple inclusion
+// restriction, these type ought to be guarded.  Follow a convention like:
+//      #ifndef SOME_GUARD_MACRO
+//      #define SOME_GUARD_MACRO
+//      class some_class;        // One incomplete class declaration
+//      class_some_other_class;  // Another incomplete class declaration
+//      #endif  // SOME_GUARD_MACRO
+//      #ifdef IPC_MESSAGE_IMPL
+//      #inlcude "path/to/some_class.h"        // Full class declaration
+//      #inlcude "path/to/some_other_class.h"  // Full class declaration
+//      #endif  // IPC_MESSAGE_IMPL
+//        (.. IPC macros using some_class and some_other_class ...)
+//
+// Macro Invocations
+//
+// You will use IPC message macro invocations for three things:
+//   - New struct definitions for IPC
+//   - Registering existing struct and enum definitions with IPC
+//   - Defining the messages themselves
+//
+// New structs are defined with IPC_STRUCT_BEGIN(), IPC_STRUCT_MEMBER(),
+// IPC_STRUCT_END() family of macros.  These cause the XXX_messages.h
+// to proclaim equivalent struct declarations for use by callers, as well
+// as later registering the type with the message generation.  Note that
+// IPC_STRUCT_MEMBER() is only permitted inside matching calls to
+// IPC_STRUCT_BEGIN() / IPC_STRUCT_END(). There is also an
+// IPC_STRUCT_BEGIN_WITH_PARENT(), which behaves like IPC_STRUCT_BEGIN(),
+// but also accomodates structs that inherit from other structs.
+//
+// Externally-defined structs are registered with IPC_STRUCT_TRAITS_BEGIN(),
+// IPC_STRUCT_TRAITS_MEMBER(), and IPC_STRUCT_TRAITS_END() macros. These
+// cause registration of the types with message generation only.
+// There's also IPC_STRUCT_TRAITS_PARENT, which is used to register a parent
+// class (whose own traits are already defined). Note that
+// IPC_STRUCT_TRAITS_MEMBER() and IPC_STRUCT_TRAITS_PARENT are only permitted
+// inside matching calls to IPC_STRUCT_TRAITS_BEGIN() /
+// IPC_STRUCT_TRAITS_END().
+//
+// Enum types are registered with a single IPC_ENUM_TRAITS_VALIDATE() macro.
+// There is no need to enumerate each value to the IPC mechanism. Instead,
+// pass an expression in terms of the parameter |value| to provide
+// range-checking.  For convenience, the IPC_ENUM_TRAITS() is provided which
+// performs no checking, passing everything including out-of-range values.
+// Its use is discouraged. The IPC_ENUM_TRAITS_MAX_VALUE() macro can be used
+// for the typical case where the enum must be in the range 0..maxvalue
+// inclusive. The IPC_ENUM_TRAITS_MIN_MAX_VALUE() macro can be used for the
+// less typical case where the enum must be in the range minvalue..maxvalue
+// inclusive.
+//
+// Do not place semicolons following these IPC_ macro invocations.  There
+// is no reason to expect that their expansion corresponds one-to-one with
+// C++ statements.
+//
+// Once the types have been declared / registered, message definitions follow.
+// "Sync" messages are just synchronous calls, the Send() call doesn't return
+// until a reply comes back.  To declare a sync message, use the IPC_SYNC_
+// macros.  The numbers at the end show how many input/output parameters there
+// are (i.e. 1_2 is 1 in, 2 out).  Input parameters are first, followed by
+// output parameters.  The caller uses Send([route id, ], in1, &out1, &out2).
+// The receiver's handler function will be
+//     void OnSyncMessageName(const type1& in1, type2* out1, type3* out2)
+//
+// A caller can also send a synchronous message, while the receiver can respond
+// at a later time.  This is transparent from the sender's side.  The receiver
+// needs to use a different handler that takes in a IPC::Message* as the output
+// type, stash the message, and when it has the data it can Send the message.
+//
+// Use the IPC_MESSAGE_HANDLER_DELAY_REPLY macro instead of IPC_MESSAGE_HANDLER
+//     IPC_MESSAGE_HANDLER_DELAY_REPLY(ViewHostMsg_SyncMessageName,
+//                                     OnSyncMessageName)
+//
+// The handler function will look like:
+//     void OnSyncMessageName(const type1& in1, IPC::Message* reply_msg);
+//
+// Receiver stashes the IPC::Message* pointer, and when it's ready, it does:
+//     ViewHostMsg_SyncMessageName::WriteReplyParams(reply_msg, out1, out2);
+//     Send(reply_msg);
+
+// Files that want to export their ipc messages should do
+//   #undef IPC_MESSAGE_EXPORT
+//   #define IPC_MESSAGE_EXPORT VISIBILITY_MACRO
+// after including this header, but before using any of the macros below.
+// (This needs to be before the include guard.)
+#undef IPC_MESSAGE_EXPORT
+#define IPC_MESSAGE_EXPORT
+
+#ifndef IPC_IPC_MESSAGE_MACROS_H_
+#define IPC_IPC_MESSAGE_MACROS_H_
+
+#include "base/profiler/scoped_profile.h"
+#include "ipc/ipc_message_utils.h"
+#include "ipc/param_traits_macros.h"
+
+#if defined(IPC_MESSAGE_IMPL)
+#include "ipc/ipc_message_utils_impl.h"
+#endif
+
+// Convenience macro for defining structs without inheritence. Should not need
+// to be subsequently redefined.
+#define IPC_STRUCT_BEGIN(struct_name) \
+  IPC_STRUCT_BEGIN_WITH_PARENT(struct_name, IPC::NoParams)
+
+// Macros for defining structs. Will be subsequently redefined.
+#define IPC_STRUCT_BEGIN_WITH_PARENT(struct_name, parent) \
+  struct struct_name; \
+  IPC_STRUCT_TRAITS_BEGIN(struct_name) \
+  IPC_STRUCT_TRAITS_END() \
+  struct IPC_MESSAGE_EXPORT struct_name : parent { \
+    struct_name(); \
+    ~struct_name();
+// Optional variadic parameters specify the default value for this struct
+// member. They are passed through to the constructor for |type|.
+#define IPC_STRUCT_MEMBER(type, name, ...) type name;
+#define IPC_STRUCT_END() };
+
+// Message macros collect specific numbers of arguments and funnel them into
+// the common message generation macro.  These should never be redefined.
+#define IPC_MESSAGE_CONTROL0(msg_class) \
+  IPC_MESSAGE_DECL(EMPTY, CONTROL, msg_class, 0, 0, (), ())
+
+#define IPC_MESSAGE_CONTROL1(msg_class, type1) \
+  IPC_MESSAGE_DECL(ASYNC, CONTROL, msg_class, 1, 0, (type1), ())
+
+#define IPC_MESSAGE_CONTROL2(msg_class, type1, type2) \
+  IPC_MESSAGE_DECL(ASYNC, CONTROL, msg_class, 2, 0, (type1, type2), ())
+
+#define IPC_MESSAGE_CONTROL3(msg_class, type1, type2, type3) \
+  IPC_MESSAGE_DECL(ASYNC, CONTROL, msg_class, 3, 0, (type1, type2, type3), ())
+
+#define IPC_MESSAGE_CONTROL4(msg_class, type1, type2, type3, type4) \
+  IPC_MESSAGE_DECL(ASYNC, CONTROL, msg_class, 4, 0, (type1, type2, type3, type4), ())
+
+#define IPC_MESSAGE_CONTROL5(msg_class, type1, type2, type3, type4, type5) \
+  IPC_MESSAGE_DECL(ASYNC, CONTROL, msg_class, 5, 0, (type1, type2, type3, type4, type5), ())
+
+#define IPC_MESSAGE_ROUTED0(msg_class) \
+  IPC_MESSAGE_DECL(EMPTY, ROUTED, msg_class, 0, 0, (), ())
+
+#define IPC_MESSAGE_ROUTED1(msg_class, type1) \
+  IPC_MESSAGE_DECL(ASYNC, ROUTED, msg_class, 1, 0, (type1), ())
+
+#define IPC_MESSAGE_ROUTED2(msg_class, type1, type2) \
+  IPC_MESSAGE_DECL(ASYNC, ROUTED, msg_class, 2, 0, (type1, type2), ())
+
+#define IPC_MESSAGE_ROUTED3(msg_class, type1, type2, type3) \
+  IPC_MESSAGE_DECL(ASYNC, ROUTED, msg_class, 3, 0, (type1, type2, type3), ())
+
+#define IPC_MESSAGE_ROUTED4(msg_class, type1, type2, type3, type4) \
+  IPC_MESSAGE_DECL(ASYNC, ROUTED, msg_class, 4, 0, (type1, type2, type3, type4), ())
+
+#define IPC_MESSAGE_ROUTED5(msg_class, type1, type2, type3, type4, type5) \
+  IPC_MESSAGE_DECL(ASYNC, ROUTED, msg_class, 5, 0, (type1, type2, type3, type4, type5), ())
+
+#define IPC_SYNC_MESSAGE_CONTROL0_0(msg_class) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 0, 0, (), ())
+
+#define IPC_SYNC_MESSAGE_CONTROL0_1(msg_class, type1_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 0, 1, (), (type1_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL0_2(msg_class, type1_out, type2_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 0, 2, (), (type1_out, type2_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL0_3(msg_class, type1_out, type2_out, type3_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 0, 3, (), (type1_out, type2_out, type3_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL0_4(msg_class, type1_out, type2_out, type3_out, type4_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 0, 4, (), (type1_out, type2_out, type3_out, type4_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL1_0(msg_class, type1_in) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 1, 0, (type1_in), ())
+
+#define IPC_SYNC_MESSAGE_CONTROL1_1(msg_class, type1_in, type1_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 1, 1, (type1_in), (type1_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL1_2(msg_class, type1_in, type1_out, type2_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 1, 2, (type1_in), (type1_out, type2_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL1_3(msg_class, type1_in, type1_out, type2_out, type3_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 1, 3, (type1_in), (type1_out, type2_out, type3_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL1_4(msg_class, type1_in, type1_out, type2_out, type3_out, type4_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 1, 4, (type1_in), (type1_out, type2_out, type3_out, type4_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL2_0(msg_class, type1_in, type2_in) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 2, 0, (type1_in, type2_in), ())
+
+#define IPC_SYNC_MESSAGE_CONTROL2_1(msg_class, type1_in, type2_in, type1_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 2, 1, (type1_in, type2_in), (type1_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL2_2(msg_class, type1_in, type2_in, type1_out, type2_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 2, 2, (type1_in, type2_in), (type1_out, type2_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL2_3(msg_class, type1_in, type2_in, type1_out, type2_out, type3_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 2, 3, (type1_in, type2_in), (type1_out, type2_out, type3_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL2_4(msg_class, type1_in, type2_in, type1_out, type2_out, type3_out, type4_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 2, 4, (type1_in, type2_in), (type1_out, type2_out, type3_out, type4_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL3_0(msg_class, type1_in, type2_in, type3_in) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 3, 0, (type1_in, type2_in, type3_in), ())
+
+#define IPC_SYNC_MESSAGE_CONTROL3_1(msg_class, type1_in, type2_in, type3_in, type1_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 3, 1, (type1_in, type2_in, type3_in), (type1_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL3_2(msg_class, type1_in, type2_in, type3_in, type1_out, type2_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 3, 2, (type1_in, type2_in, type3_in), (type1_out, type2_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL3_3(msg_class, type1_in, type2_in, type3_in, type1_out, type2_out, type3_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 3, 3, (type1_in, type2_in, type3_in), (type1_out, type2_out, type3_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL3_4(msg_class, type1_in, type2_in, type3_in, type1_out, type2_out, type3_out, type4_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 3, 4, (type1_in, type2_in, type3_in), (type1_out, type2_out, type3_out, type4_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL4_0(msg_class, type1_in, type2_in, type3_in, type4_in) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 4, 0, (type1_in, type2_in, type3_in, type4_in), ())
+
+#define IPC_SYNC_MESSAGE_CONTROL4_1(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 4, 1, (type1_in, type2_in, type3_in, type4_in), (type1_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL4_2(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out, type2_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 4, 2, (type1_in, type2_in, type3_in, type4_in), (type1_out, type2_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL4_3(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out, type2_out, type3_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 4, 3, (type1_in, type2_in, type3_in, type4_in), (type1_out, type2_out, type3_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL4_4(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out, type2_out, type3_out, type4_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 4, 4, (type1_in, type2_in, type3_in, type4_in), (type1_out, type2_out, type3_out, type4_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL5_0(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 5, 0, (type1_in, type2_in, type3_in, type4_in, type5_in), ())
+
+#define IPC_SYNC_MESSAGE_CONTROL5_1(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in, type1_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 5, 1, (type1_in, type2_in, type3_in, type4_in, type5_in), (type1_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL5_2(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in, type1_out, type2_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 5, 2, (type1_in, type2_in, type3_in, type4_in, type5_in), (type1_out, type2_out))
+
+#define IPC_SYNC_MESSAGE_CONTROL5_3(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in, type1_out, type2_out, type3_out) \
+  IPC_MESSAGE_DECL(SYNC, CONTROL, msg_class, 5, 3, (type1_in, type2_in, type3_in, type4_in, type5_in), (type1_out, type2_out, type3_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED0_0(msg_class) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 0, 0, (), ())
+
+#define IPC_SYNC_MESSAGE_ROUTED0_1(msg_class, type1_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 0, 1, (), (type1_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED0_2(msg_class, type1_out, type2_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 0, 2, (), (type1_out, type2_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED0_3(msg_class, type1_out, type2_out, type3_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 0, 3, (), (type1_out, type2_out, type3_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED0_4(msg_class, type1_out, type2_out, type3_out, type4_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 0, 4, (), (type1_out, type2_out, type3_out, type4_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED1_0(msg_class, type1_in) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 1, 0, (type1_in), ())
+
+#define IPC_SYNC_MESSAGE_ROUTED1_1(msg_class, type1_in, type1_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 1, 1, (type1_in), (type1_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED1_2(msg_class, type1_in, type1_out, type2_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 1, 2, (type1_in), (type1_out, type2_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED1_3(msg_class, type1_in, type1_out, type2_out, type3_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 1, 3, (type1_in), (type1_out, type2_out, type3_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED1_4(msg_class, type1_in, type1_out, type2_out, type3_out, type4_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 1, 4, (type1_in), (type1_out, type2_out, type3_out, type4_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED2_0(msg_class, type1_in, type2_in) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 2, 0, (type1_in, type2_in), ())
+
+#define IPC_SYNC_MESSAGE_ROUTED2_1(msg_class, type1_in, type2_in, type1_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 2, 1, (type1_in, type2_in), (type1_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED2_2(msg_class, type1_in, type2_in, type1_out, type2_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 2, 2, (type1_in, type2_in), (type1_out, type2_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED2_3(msg_class, type1_in, type2_in, type1_out, type2_out, type3_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 2, 3, (type1_in, type2_in), (type1_out, type2_out, type3_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED2_4(msg_class, type1_in, type2_in, type1_out, type2_out, type3_out, type4_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 2, 4, (type1_in, type2_in), (type1_out, type2_out, type3_out, type4_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED3_0(msg_class, type1_in, type2_in, type3_in) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 3, 0, (type1_in, type2_in, type3_in), ())
+
+#define IPC_SYNC_MESSAGE_ROUTED3_1(msg_class, type1_in, type2_in, type3_in, type1_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 3, 1, (type1_in, type2_in, type3_in), (type1_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED3_2(msg_class, type1_in, type2_in, type3_in, type1_out, type2_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 3, 2, (type1_in, type2_in, type3_in), (type1_out, type2_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED3_3(msg_class, type1_in, type2_in, type3_in, type1_out, type2_out, type3_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 3, 3, (type1_in, type2_in, type3_in), (type1_out, type2_out, type3_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED3_4(msg_class, type1_in, type2_in, type3_in, type1_out, type2_out, type3_out, type4_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 3, 4, (type1_in, type2_in, type3_in), (type1_out, type2_out, type3_out, type4_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED4_0(msg_class, type1_in, type2_in, type3_in, type4_in) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 4, 0, (type1_in, type2_in, type3_in, type4_in), ())
+
+#define IPC_SYNC_MESSAGE_ROUTED4_1(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 4, 1, (type1_in, type2_in, type3_in, type4_in), (type1_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED4_2(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out, type2_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 4, 2, (type1_in, type2_in, type3_in, type4_in), (type1_out, type2_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED4_3(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out, type2_out, type3_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 4, 3, (type1_in, type2_in, type3_in, type4_in), (type1_out, type2_out, type3_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED4_4(msg_class, type1_in, type2_in, type3_in, type4_in, type1_out, type2_out, type3_out, type4_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 4, 4, (type1_in, type2_in, type3_in, type4_in), (type1_out, type2_out, type3_out, type4_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED5_0(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 5, 0, (type1_in, type2_in, type3_in, type4_in, type5_in), ())
+
+#define IPC_SYNC_MESSAGE_ROUTED5_1(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in, type1_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 5, 1, (type1_in, type2_in, type3_in, type4_in, type5_in), (type1_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED5_2(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in, type1_out, type2_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 5, 2, (type1_in, type2_in, type3_in, type4_in, type5_in), (type1_out, type2_out))
+
+#define IPC_SYNC_MESSAGE_ROUTED5_3(msg_class, type1_in, type2_in, type3_in, type4_in, type5_in, type1_out, type2_out, type3_out) \
+  IPC_MESSAGE_DECL(SYNC, ROUTED, msg_class, 5, 3, (type1_in, type2_in, type3_in, type4_in, type5_in), (type1_out, type2_out, type3_out))
+
+// The following macros define the common set of methods provided by ASYNC
+// message classes.
+#define IPC_ASYNC_MESSAGE_METHODS_GENERIC                                     \
+  template<class T, class S, class Method>                                    \
+  static bool Dispatch(const Message* msg, T* obj, S* sender, Method func) {  \
+    Schema::Param p;                                                          \
+    if (Read(msg, &p)) {                                                      \
+      DispatchToMethod(obj, func, p);                                         \
+      return true;                                                            \
+    }                                                                         \
+    return false;                                                             \
+  }
+#define IPC_ASYNC_MESSAGE_METHODS_1                                           \
+  IPC_ASYNC_MESSAGE_METHODS_GENERIC                                           \
+  template<class T, class S, typename TA>                                     \
+  static bool Dispatch(const Message* msg, T* obj, S* sender,                 \
+                       void (T::*func)(const Message&, TA)) {                 \
+    Schema::Param p;                                                          \
+    if (Read(msg, &p)) {                                                      \
+      (obj->*func)(*msg, p.a);                                                \
+      return true;                                                            \
+    }                                                                         \
+    return false;                                                             \
+  }
+#define IPC_ASYNC_MESSAGE_METHODS_2                                           \
+  IPC_ASYNC_MESSAGE_METHODS_GENERIC                                           \
+  template<class T, class S, typename TA, typename TB>                        \
+  static bool Dispatch(const Message* msg, T* obj, S* sender,                 \
+                       void (T::*func)(const Message&, TA, TB)) {             \
+    Schema::Param p;                                                          \
+    if (Read(msg, &p)) {                                                      \
+      (obj->*func)(*msg, p.a, p.b);                                           \
+      return true;                                                            \
+    }                                                                         \
+    return false;                                                             \
+  }                                                                           \
+  template<typename TA, typename TB>                                          \
+  static bool Read(const IPC::Message* msg, TA* a, TB* b) {                   \
+    Schema::Param p;                                                          \
+    if (!Read(msg, &p))                                                       \
+      return false;                                                           \
+    *a = p.a;                                                                 \
+    *b = p.b;                                                                 \
+    return true;                                                              \
+  }
+#define IPC_ASYNC_MESSAGE_METHODS_3                                           \
+  IPC_ASYNC_MESSAGE_METHODS_GENERIC                                           \
+  template<class T, class S, typename TA, typename TB, typename TC>           \
+  static bool Dispatch(const Message* msg, T* obj, S* sender,                 \
+                       void (T::*func)(const Message&, TA, TB, TC)) {         \
+    Schema::Param p;                                                          \
+    if (Read(msg, &p)) {                                                      \
+      (obj->*func)(*msg, p.a, p.b, p.c);                                      \
+      return true;                                                            \
+    }                                                                         \
+    return false;                                                             \
+  }                                                                           \
+  template<typename TA, typename TB, typename TC>                             \
+  static bool Read(const IPC::Message* msg, TA* a, TB* b, TC* c) {            \
+    Schema::Param p;                                                          \
+    if (!Read(msg, &p))                                                       \
+      return false;                                                           \
+    *a = p.a;                                                                 \
+    *b = p.b;                                                                 \
+    *c = p.c;                                                                 \
+    return true;                                                              \
+  }
+#define IPC_ASYNC_MESSAGE_METHODS_4                                           \
+  IPC_ASYNC_MESSAGE_METHODS_GENERIC                                           \
+  template<class T, class S, typename TA, typename TB, typename TC,           \
+           typename TD>                                                       \
+  static bool Dispatch(const Message* msg, T* obj, S* sender,                 \
+                       void (T::*func)(const Message&, TA, TB, TC, TD)) {     \
+    Schema::Param p;                                                          \
+    if (Read(msg, &p)) {                                                      \
+      (obj->*func)(*msg, p.a, p.b, p.c, p.d);                                 \
+      return true;                                                            \
+    }                                                                         \
+    return false;                                                             \
+  }                                                                           \
+  template<typename TA, typename TB, typename TC, typename TD>                \
+  static bool Read(const IPC::Message* msg, TA* a, TB* b, TC* c, TD* d) {     \
+    Schema::Param p;                                                          \
+    if (!Read(msg, &p))                                                       \
+      return false;                                                           \
+    *a = p.a;                                                                 \
+    *b = p.b;                                                                 \
+    *c = p.c;                                                                 \
+    *d = p.d;                                                                 \
+    return true;                                                              \
+  }
+#define IPC_ASYNC_MESSAGE_METHODS_5                                           \
+  IPC_ASYNC_MESSAGE_METHODS_GENERIC                                           \
+  template<class T, class S, typename TA, typename TB, typename TC,           \
+           typename TD, typename TE>                                          \
+  static bool Dispatch(const Message* msg, T* obj, S* sender,                 \
+                       void (T::*func)(const Message&, TA, TB, TC, TD, TE)) { \
+    Schema::Param p;                                                          \
+    if (Read(msg, &p)) {                                                      \
+      (obj->*func)(*msg, p.a, p.b, p.c, p.d, p.e);                            \
+      return true;                                                            \
+    }                                                                         \
+    return false;                                                             \
+  }                                                                           \
+  template<typename TA, typename TB, typename TC, typename TD, typename TE>   \
+  static bool Read(const IPC::Message* msg, TA* a, TB* b, TC* c, TD* d,       \
+                   TE* e) {                                                   \
+    Schema::Param p;                                                          \
+    if (!Read(msg, &p))                                                       \
+      return false;                                                           \
+    *a = p.a;                                                                 \
+    *b = p.b;                                                                 \
+    *c = p.c;                                                                 \
+    *d = p.d;                                                                 \
+    *e = p.e;                                                                 \
+    return true;                                                              \
+  }
+
+// The following macros define the common set of methods provided by SYNC
+// message classes.
+#define IPC_SYNC_MESSAGE_METHODS_GENERIC                                      \
+  template<class T, class S, class Method>                                    \
+  static bool Dispatch(const Message* msg, T* obj, S* sender, Method func) {  \
+    Schema::SendParam send_params;                                            \
+    bool ok = ReadSendParam(msg, &send_params);                               \
+    return Schema::DispatchWithSendParams(ok, send_params, msg, obj, sender,  \
+                                          func);                              \
+  }                                                                           \
+  template<class T, class Method>                                             \
+  static bool DispatchDelayReply(const Message* msg, T* obj, Method func) {   \
+    Schema::SendParam send_params;                                            \
+    bool ok = ReadSendParam(msg, &send_params);                               \
+    return Schema::DispatchDelayReplyWithSendParams(ok, send_params, msg,     \
+                                                    obj, func);               \
+  }
+#define IPC_SYNC_MESSAGE_METHODS_0 \
+  IPC_SYNC_MESSAGE_METHODS_GENERIC
+#define IPC_SYNC_MESSAGE_METHODS_1 \
+  IPC_SYNC_MESSAGE_METHODS_GENERIC \
+  template<typename TA> \
+  static void WriteReplyParams(Message* reply, TA a) { \
+    Schema::WriteReplyParams(reply, a); \
+  }
+#define IPC_SYNC_MESSAGE_METHODS_2 \
+  IPC_SYNC_MESSAGE_METHODS_GENERIC \
+  template<typename TA, typename TB> \
+  static void WriteReplyParams(Message* reply, TA a, TB b) { \
+    Schema::WriteReplyParams(reply, a, b); \
+  }
+#define IPC_SYNC_MESSAGE_METHODS_3 \
+  IPC_SYNC_MESSAGE_METHODS_GENERIC \
+  template<typename TA, typename TB, typename TC> \
+  static void WriteReplyParams(Message* reply, TA a, TB b, TC c) { \
+    Schema::WriteReplyParams(reply, a, b, c); \
+  }
+#define IPC_SYNC_MESSAGE_METHODS_4 \
+  IPC_SYNC_MESSAGE_METHODS_GENERIC \
+  template<typename TA, typename TB, typename TC, typename TD> \
+  static void WriteReplyParams(Message* reply, TA a, TB b, TC c, TD d) { \
+    Schema::WriteReplyParams(reply, a, b, c, d); \
+  }
+#define IPC_SYNC_MESSAGE_METHODS_5 \
+  IPC_SYNC_MESSAGE_METHODS_GENERIC \
+  template<typename TA, typename TB, typename TC, typename TD, typename TE> \
+  static void WriteReplyParams(Message* reply, TA a, TB b, TC c, TD d, TE e) { \
+    Schema::WriteReplyParams(reply, a, b, c, d, e); \
+  }
+
+// Common message macro which dispatches into one of the 6 (sync x kind)
+// routines.  There is a way that these 6 cases can be lumped together,
+// but the  macros get very complicated in that case.
+// Note: intended be redefined to generate other information.
+#define IPC_MESSAGE_DECL(sync, kind, msg_class,                               \
+                         in_cnt, out_cnt, in_list, out_list)                  \
+  IPC_##sync##_##kind##_DECL(msg_class, in_cnt, out_cnt, in_list, out_list)   \
+  IPC_MESSAGE_EXTRA(sync, kind, msg_class, in_cnt, out_cnt, in_list, out_list)
+
+#define IPC_EMPTY_CONTROL_DECL(msg_class, in_cnt, out_cnt, in_list, out_list) \
+  class IPC_MESSAGE_EXPORT msg_class : public IPC::Message {                  \
+   public:                                                                    \
+    typedef IPC::Message Schema;                                              \
+    enum { ID = IPC_MESSAGE_ID() };                                           \
+    msg_class() : IPC::Message(MSG_ROUTING_CONTROL, ID, PRIORITY_NORMAL) {}   \
+    static void Log(std::string* name, const Message* msg, std::string* l);   \
+  };
+
+#define IPC_EMPTY_ROUTED_DECL(msg_class, in_cnt, out_cnt, in_list, out_list)  \
+  class IPC_MESSAGE_EXPORT msg_class : public IPC::Message {                  \
+   public:                                                                    \
+    typedef IPC::Message Schema;                                              \
+    enum { ID = IPC_MESSAGE_ID() };                                           \
+    msg_class(int32 routing_id)                                               \
+        : IPC::Message(routing_id, ID, PRIORITY_NORMAL) {}                    \
+    static void Log(std::string* name, const Message* msg, std::string* l);   \
+  };
+
+#define IPC_ASYNC_CONTROL_DECL(msg_class, in_cnt, out_cnt, in_list, out_list) \
+  class IPC_MESSAGE_EXPORT msg_class : public IPC::Message {                  \
+   public:                                                                    \
+    typedef IPC::MessageSchema<IPC_TUPLE_IN_##in_cnt in_list> Schema;         \
+    typedef Schema::Param Param;                                              \
+    enum { ID = IPC_MESSAGE_ID() };                                           \
+    msg_class(IPC_TYPE_IN_##in_cnt in_list);                                  \
+    virtual ~msg_class();                                                     \
+    static bool Read(const Message* msg, Schema::Param* p);                   \
+    static void Log(std::string* name, const Message* msg, std::string* l);   \
+    IPC_ASYNC_MESSAGE_METHODS_##in_cnt                                        \
+  };
+
+#define IPC_ASYNC_ROUTED_DECL(msg_class, in_cnt, out_cnt, in_list, out_list)  \
+  class IPC_MESSAGE_EXPORT msg_class : public IPC::Message {                  \
+   public:                                                                    \
+    typedef IPC::MessageSchema<IPC_TUPLE_IN_##in_cnt in_list> Schema;         \
+    typedef Schema::Param Param;                                              \
+    enum { ID = IPC_MESSAGE_ID() };                                           \
+    msg_class(int32 routing_id IPC_COMMA_##in_cnt                             \
+              IPC_TYPE_IN_##in_cnt in_list);                                  \
+    virtual ~msg_class();                                                     \
+    static bool Read(const Message* msg, Schema::Param* p);                   \
+    static void Log(std::string* name, const Message* msg, std::string* l);   \
+    IPC_ASYNC_MESSAGE_METHODS_##in_cnt                                        \
+  };
+
+#define IPC_SYNC_CONTROL_DECL(msg_class, in_cnt, out_cnt, in_list, out_list)  \
+  class IPC_MESSAGE_EXPORT msg_class : public IPC::SyncMessage {              \
+   public:                                                                    \
+    typedef IPC::SyncMessageSchema<IPC_TUPLE_IN_##in_cnt in_list,             \
+                                   IPC_TUPLE_OUT_##out_cnt out_list> Schema;  \
+    typedef Schema::ReplyParam ReplyParam;                                    \
+    typedef Schema::SendParam SendParam;                                      \
+    enum { ID = IPC_MESSAGE_ID() };                                           \
+    msg_class(IPC_TYPE_IN_##in_cnt in_list                                    \
+              IPC_COMMA_AND_##in_cnt(IPC_COMMA_##out_cnt)                     \
+              IPC_TYPE_OUT_##out_cnt out_list);                               \
+    virtual ~msg_class();                                                     \
+    static bool ReadSendParam(const Message* msg, Schema::SendParam* p);      \
+    static bool ReadReplyParam(                                               \
+        const Message* msg,                                                   \
+        TupleTypes<ReplyParam>::ValueTuple* p);                               \
+    static void Log(std::string* name, const Message* msg, std::string* l);   \
+    IPC_SYNC_MESSAGE_METHODS_##out_cnt                                        \
+  };
+
+#define IPC_SYNC_ROUTED_DECL(msg_class, in_cnt, out_cnt, in_list, out_list)   \
+  class IPC_MESSAGE_EXPORT msg_class : public IPC::SyncMessage {              \
+   public:                                                                    \
+    typedef IPC::SyncMessageSchema<IPC_TUPLE_IN_##in_cnt in_list,             \
+                                   IPC_TUPLE_OUT_##out_cnt out_list> Schema;  \
+    typedef Schema::ReplyParam ReplyParam;                                    \
+    typedef Schema::SendParam SendParam;                                      \
+    enum { ID = IPC_MESSAGE_ID() };                                           \
+    msg_class(int32 routing_id                                                \
+              IPC_COMMA_OR_##in_cnt(IPC_COMMA_##out_cnt)                      \
+              IPC_TYPE_IN_##in_cnt in_list                                    \
+              IPC_COMMA_AND_##in_cnt(IPC_COMMA_##out_cnt)                     \
+              IPC_TYPE_OUT_##out_cnt out_list);                               \
+    virtual ~msg_class();                                                     \
+    static bool ReadSendParam(const Message* msg, Schema::SendParam* p);      \
+    static bool ReadReplyParam(                                               \
+        const Message* msg,                                                   \
+        TupleTypes<ReplyParam>::ValueTuple* p);                               \
+    static void Log(std::string* name, const Message* msg, std::string* l);   \
+    IPC_SYNC_MESSAGE_METHODS_##out_cnt                                        \
+  };
+
+#if defined(IPC_MESSAGE_IMPL)
+
+// "Implementation" inclusion produces constructors, destructors, and
+// logging functions, except for the no-arg special cases, where the
+// implementation occurs in the declaration, and there is no special
+// logging function.
+#define IPC_MESSAGE_EXTRA(sync, kind, msg_class,                              \
+                          in_cnt, out_cnt, in_list, out_list)                 \
+  IPC_##sync##_##kind##_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list)   \
+  IPC_##sync##_MESSAGE_LOG(msg_class)
+
+#define IPC_EMPTY_CONTROL_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list)
+#define IPC_EMPTY_ROUTED_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list)
+
+#define IPC_ASYNC_CONTROL_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list) \
+  msg_class::msg_class(IPC_TYPE_IN_##in_cnt in_list) :                        \
+      IPC::Message(MSG_ROUTING_CONTROL, ID, PRIORITY_NORMAL) {                \
+        Schema::Write(this, IPC_NAME_IN_##in_cnt in_list);                    \
+      }                                                                       \
+  msg_class::~msg_class() {}                                                  \
+  bool msg_class::Read(const Message* msg, Schema::Param* p) {                \
+    return Schema::Read(msg, p);                                              \
+  }
+
+#define IPC_ASYNC_ROUTED_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list)  \
+  msg_class::msg_class(int32 routing_id IPC_COMMA_##in_cnt                    \
+                       IPC_TYPE_IN_##in_cnt in_list) :                        \
+      IPC::Message(routing_id, ID, PRIORITY_NORMAL) {                         \
+        Schema::Write(this, IPC_NAME_IN_##in_cnt in_list);                    \
+      }                                                                       \
+  msg_class::~msg_class() {}                                                  \
+  bool msg_class::Read(const Message* msg, Schema::Param* p) {                \
+    return Schema::Read(msg, p);                                              \
+  }
+
+#define IPC_SYNC_CONTROL_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list)  \
+  msg_class::msg_class(IPC_TYPE_IN_##in_cnt in_list                           \
+                       IPC_COMMA_AND_##in_cnt(IPC_COMMA_##out_cnt)            \
+                       IPC_TYPE_OUT_##out_cnt out_list) :                     \
+      IPC::SyncMessage(MSG_ROUTING_CONTROL, ID, PRIORITY_NORMAL,              \
+                       new IPC::ParamDeserializer<Schema::ReplyParam>(        \
+                           IPC_NAME_OUT_##out_cnt out_list)) {                \
+        Schema::Write(this, IPC_NAME_IN_##in_cnt in_list);                    \
+      }                                                                       \
+  msg_class::~msg_class() {}                                                  \
+  bool msg_class::ReadSendParam(const Message* msg, Schema::SendParam* p) {   \
+    return Schema::ReadSendParam(msg, p);                                     \
+  }                                                                           \
+  bool msg_class::ReadReplyParam(const Message* msg,                          \
+                                 TupleTypes<ReplyParam>::ValueTuple* p) {     \
+    return Schema::ReadReplyParam(msg, p);                                    \
+  }
+
+#define IPC_SYNC_ROUTED_IMPL(msg_class, in_cnt, out_cnt, in_list, out_list)   \
+  msg_class::msg_class(int32 routing_id                                       \
+                       IPC_COMMA_OR_##in_cnt(IPC_COMMA_##out_cnt)             \
+                       IPC_TYPE_IN_##in_cnt in_list                           \
+                       IPC_COMMA_AND_##in_cnt(IPC_COMMA_##out_cnt)            \
+                       IPC_TYPE_OUT_##out_cnt out_list) :                     \
+      IPC::SyncMessage(routing_id, ID, PRIORITY_NORMAL,                       \
+                       new IPC::ParamDeserializer<Schema::ReplyParam>(        \
+                           IPC_NAME_OUT_##out_cnt out_list)) {                \
+        Schema::Write(this, IPC_NAME_IN_##in_cnt in_list);                    \
+      }                                                                       \
+  msg_class::~msg_class() {}                                                  \
+  bool msg_class::ReadSendParam(const Message* msg, Schema::SendParam* p) {   \
+    return Schema::ReadSendParam(msg, p);                                     \
+  }                                                                           \
+  bool msg_class::ReadReplyParam(const Message* msg,                          \
+                                 TupleTypes<ReplyParam>::ValueTuple* p) {     \
+    return Schema::ReadReplyParam(msg, p);                                    \
+  }
+
+#define IPC_EMPTY_MESSAGE_LOG(msg_class)                                \
+  void msg_class::Log(std::string* name,                                \
+                      const Message* msg,                               \
+                      std::string* l) {                                 \
+    if (name)                                                           \
+      *name = #msg_class;                                               \
+  }
+
+#define IPC_ASYNC_MESSAGE_LOG(msg_class)                                \
+  void msg_class::Log(std::string* name,                                \
+                      const Message* msg,                               \
+                      std::string* l) {                                 \
+    if (name)                                                           \
+      *name = #msg_class;                                               \
+    if (!msg || !l)                                                     \
+      return;                                                           \
+    Schema::Param p;                                                    \
+    if (Schema::Read(msg, &p))                                          \
+      IPC::LogParam(p, l);                                              \
+  }
+
+#define IPC_SYNC_MESSAGE_LOG(msg_class)                                 \
+  void msg_class::Log(std::string* name,                                \
+                      const Message* msg,                               \
+                      std::string* l) {                                 \
+    if (name)                                                           \
+      *name = #msg_class;                                               \
+    if (!msg || !l)                                                     \
+      return;                                                           \
+    if (msg->is_sync()) {                                               \
+      TupleTypes<Schema::SendParam>::ValueTuple p;                      \
+      if (Schema::ReadSendParam(msg, &p))                               \
+        IPC::LogParam(p, l);                                            \
+      AddOutputParamsToLog(msg, l);                                     \
+    } else {                                                            \
+      TupleTypes<Schema::ReplyParam>::ValueTuple p;                     \
+      if (Schema::ReadReplyParam(msg, &p))                              \
+        IPC::LogParam(p, l);                                            \
+    }                                                                   \
+  }
+
+#elif defined(IPC_MESSAGE_MACROS_LOG_ENABLED)
+
+#ifndef IPC_LOG_TABLE_ADD_ENTRY
+#error You need to define IPC_LOG_TABLE_ADD_ENTRY(msg_id, logger)
+#endif
+
+// "Log table" inclusion produces extra logging registration code.
+#define IPC_MESSAGE_EXTRA(sync, kind, msg_class,                        \
+                          in_cnt, out_cnt, in_list, out_list)           \
+  class LoggerRegisterHelper##msg_class {                               \
+ public:                                                                \
+    LoggerRegisterHelper##msg_class() {                                 \
+      const uint32 msg_id = static_cast<uint32>(msg_class::ID);         \
+      IPC_LOG_TABLE_ADD_ENTRY(msg_id, msg_class::Log);                  \
+    }                                                                   \
+  };                                                                    \
+  LoggerRegisterHelper##msg_class g_LoggerRegisterHelper##msg_class;
+
+#else
+
+// Normal inclusion produces nothing extra.
+#define IPC_MESSAGE_EXTRA(sync, kind, msg_class,                \
+                          in_cnt, out_cnt, in_list, out_list)
+
+#endif // defined(IPC_MESSAGE_IMPL)
+
+// Handle variable sized argument lists.  These are usually invoked by token
+// pasting against the argument counts.
+#define IPC_TYPE_IN_0()
+#define IPC_TYPE_IN_1(t1)                   const t1& arg1
+#define IPC_TYPE_IN_2(t1, t2)               const t1& arg1, const t2& arg2
+#define IPC_TYPE_IN_3(t1, t2, t3)           const t1& arg1, const t2& arg2, const t3& arg3
+#define IPC_TYPE_IN_4(t1, t2, t3, t4)       const t1& arg1, const t2& arg2, const t3& arg3, const t4& arg4
+#define IPC_TYPE_IN_5(t1, t2, t3, t4, t5)   const t1& arg1, const t2& arg2, const t3& arg3, const t4& arg4, const t5& arg5
+
+#define IPC_TYPE_OUT_0()
+#define IPC_TYPE_OUT_1(t1)                  t1* arg6
+#define IPC_TYPE_OUT_2(t1, t2)              t1* arg6, t2* arg7
+#define IPC_TYPE_OUT_3(t1, t2, t3)          t1* arg6, t2* arg7, t3* arg8
+#define IPC_TYPE_OUT_4(t1, t2, t3, t4)      t1* arg6, t2* arg7, t3* arg8, t4* arg9
+
+#define IPC_TUPLE_IN_0()                    Tuple0
+#define IPC_TUPLE_IN_1(t1)                  Tuple1<t1>
+#define IPC_TUPLE_IN_2(t1, t2)              Tuple2<t1, t2>
+#define IPC_TUPLE_IN_3(t1, t2, t3)          Tuple3<t1, t2, t3>
+#define IPC_TUPLE_IN_4(t1, t2, t3, t4)      Tuple4<t1, t2, t3, t4>
+#define IPC_TUPLE_IN_5(t1, t2, t3, t4, t5)  Tuple5<t1, t2, t3, t4, t5>
+
+#define IPC_TUPLE_OUT_0()                   Tuple0
+#define IPC_TUPLE_OUT_1(t1)                 Tuple1<t1&>
+#define IPC_TUPLE_OUT_2(t1, t2)             Tuple2<t1&, t2&>
+#define IPC_TUPLE_OUT_3(t1, t2, t3)         Tuple3<t1&, t2&, t3&>
+#define IPC_TUPLE_OUT_4(t1, t2, t3, t4)     Tuple4<t1&, t2&, t3&, t4&>
+
+#define IPC_NAME_IN_0()                     MakeTuple()
+#define IPC_NAME_IN_1(t1)                   MakeRefTuple(arg1)
+#define IPC_NAME_IN_2(t1, t2)               MakeRefTuple(arg1, arg2)
+#define IPC_NAME_IN_3(t1, t2, t3)           MakeRefTuple(arg1, arg2, arg3)
+#define IPC_NAME_IN_4(t1, t2, t3, t4)       MakeRefTuple(arg1, arg2, arg3, arg4)
+#define IPC_NAME_IN_5(t1, t2, t3, t4, t5)   MakeRefTuple(arg1, arg2, arg3, arg4, arg5)
+
+#define IPC_NAME_OUT_0()                    MakeTuple()
+#define IPC_NAME_OUT_1(t1)                  MakeRefTuple(*arg6)
+#define IPC_NAME_OUT_2(t1, t2)              MakeRefTuple(*arg6, *arg7)
+#define IPC_NAME_OUT_3(t1, t2, t3)          MakeRefTuple(*arg6, *arg7, *arg8)
+#define IPC_NAME_OUT_4(t1, t2, t3, t4)      MakeRefTuple(*arg6, *arg7, *arg8, *arg9)
+
+// There are places where the syntax requires a comma if there are input args,
+// if there are input args and output args, or if there are input args or
+// output args.  These macros allow generation of the comma as needed; invoke
+// by token pasting against the argument counts.
+#define IPC_COMMA_0
+#define IPC_COMMA_1 ,
+#define IPC_COMMA_2 ,
+#define IPC_COMMA_3 ,
+#define IPC_COMMA_4 ,
+#define IPC_COMMA_5 ,
+
+#define IPC_COMMA_AND_0(x)
+#define IPC_COMMA_AND_1(x) x
+#define IPC_COMMA_AND_2(x) x
+#define IPC_COMMA_AND_3(x) x
+#define IPC_COMMA_AND_4(x) x
+#define IPC_COMMA_AND_5(x) x
+
+#define IPC_COMMA_OR_0(x) x
+#define IPC_COMMA_OR_1(x) ,
+#define IPC_COMMA_OR_2(x) ,
+#define IPC_COMMA_OR_3(x) ,
+#define IPC_COMMA_OR_4(x) ,
+#define IPC_COMMA_OR_5(x) ,
+
+// Message IDs
+// Note: we currently use __LINE__ to give unique IDs to messages within
+// a file.  They're globally unique since each file defines its own
+// IPC_MESSAGE_START.
+#define IPC_MESSAGE_ID() ((IPC_MESSAGE_START << 16) + __LINE__)
+#define IPC_MESSAGE_ID_CLASS(id) ((id) >> 16)
+#define IPC_MESSAGE_ID_LINE(id) ((id) & 0xffff)
+
+// Message crackers and handlers.
+// Prefer to use the IPC_BEGIN_MESSAGE_MAP_EX to the older macros since they
+// allow you to detect when a message could not be de-serialized. Usage:
+//
+//   bool MyClass::OnMessageReceived(const IPC::Message& msg) {
+//     bool handled = true;
+//     bool msg_is_good = false;
+//     IPC_BEGIN_MESSAGE_MAP_EX(MyClass, msg, msg_is_good)
+//       IPC_MESSAGE_HANDLER(MsgClassOne, OnMsgClassOne)
+//       ...more handlers here ...
+//       IPC_MESSAGE_HANDLER(MsgClassTen, OnMsgClassTen)
+//       IPC_MESSAGE_UNHANDLED(handled = false)
+//     IPC_END_MESSAGE_MAP_EX()
+//     if (!msg_is_good) {
+//       // Signal error here or terminate offending process.
+//     }
+//     return handled;
+//   }
+
+
+#define IPC_BEGIN_MESSAGE_MAP_EX(class_name, msg, msg_is_ok) \
+  { \
+    typedef class_name _IpcMessageHandlerClass; \
+    const IPC::Message& ipc_message__ = msg; \
+    bool& msg_is_ok__ = msg_is_ok; \
+    switch (ipc_message__.type()) { \
+
+#define IPC_BEGIN_MESSAGE_MAP(class_name, msg) \
+  { \
+    typedef class_name _IpcMessageHandlerClass; \
+    const IPC::Message& ipc_message__ = msg; \
+    bool msg_is_ok__ = true; \
+    switch (ipc_message__.type()) { \
+
+#define IPC_MESSAGE_FORWARD(msg_class, obj, member_func)                       \
+    case msg_class::ID: {                                                      \
+        TRACK_RUN_IN_IPC_HANDLER(member_func);                                 \
+        msg_is_ok__ = msg_class::Dispatch(&ipc_message__, obj, this,           \
+                                      &member_func);                           \
+      }                                                                        \
+      break;
+
+#define IPC_MESSAGE_HANDLER(msg_class, member_func) \
+  IPC_MESSAGE_FORWARD(msg_class, this, _IpcMessageHandlerClass::member_func)
+
+#define IPC_MESSAGE_FORWARD_DELAY_REPLY(msg_class, obj, member_func)           \
+    case msg_class::ID: {                                                      \
+        TRACK_RUN_IN_IPC_HANDLER(member_func);                                 \
+        msg_is_ok__ = msg_class::DispatchDelayReply(&ipc_message__, obj,       \
+                                                  &member_func);               \
+      }                                                                        \
+      break;
+
+#define IPC_MESSAGE_HANDLER_DELAY_REPLY(msg_class, member_func)                \
+    IPC_MESSAGE_FORWARD_DELAY_REPLY(msg_class, this,                           \
+                                    _IpcMessageHandlerClass::member_func)
+
+// TODO(jar): fix chrome frame to always supply |code| argument.
+#define IPC_MESSAGE_HANDLER_GENERIC(msg_class, code)                           \
+    case msg_class::ID: {                                                      \
+        /* TRACK_RUN_IN_IPC_HANDLER(code);  TODO(jar) */                       \
+        code;                                                                  \
+      }                                                                        \
+      break;
+
+#define IPC_REPLY_HANDLER(func)                                                \
+    case IPC_REPLY_ID: {                                                       \
+        TRACK_RUN_IN_IPC_HANDLER(func);                                        \
+        func(ipc_message__);                                                   \
+      }                                                                        \
+      break;
+
+
+#define IPC_MESSAGE_UNHANDLED(code)                                            \
+    default: {                                                                 \
+        code;                                                                  \
+      }                                                                        \
+      break;
+
+#define IPC_MESSAGE_UNHANDLED_ERROR() \
+  IPC_MESSAGE_UNHANDLED(NOTREACHED() << \
+                              "Invalid message with type = " << \
+                              ipc_message__.type())
+
+#define IPC_END_MESSAGE_MAP() \
+    DCHECK(msg_is_ok__); \
+  } \
+}
+
+#define IPC_END_MESSAGE_MAP_EX() \
+  } \
+}
+
+// This corresponds to an enum value from IPCMessageStart.
+#define IPC_MESSAGE_CLASS(message) \
+  IPC_MESSAGE_ID_CLASS(message.type())
+
+#endif  // IPC_IPC_MESSAGE_MACROS_H_
+
+// Clean up IPC_MESSAGE_START in this unguarded section so that the
+// XXX_messages.h files need not do so themselves.  This makes the
+// XXX_messages.h files easier to write.
+#undef IPC_MESSAGE_START