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diff --git a/deps/v8/src/d8.h b/deps/v8/src/d8.h
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+// Copyright 2009 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef V8_D8_H_
+#define V8_D8_H_
+
+#include "v8.h"
+#include "hashmap.h"
+
+
+namespace v8 {
+
+
+namespace i = v8::internal;
+
+
+// A single counter in a counter collection.
+class Counter {
+ public:
+  static const int kMaxNameSize = 64;
+  int32_t* Bind(const char* name, bool histogram);
+  int32_t* ptr() { return &count_; }
+  int32_t count() { return count_; }
+  int32_t sample_total() { return sample_total_; }
+  bool is_histogram() { return is_histogram_; }
+  void AddSample(int32_t sample);
+ private:
+  int32_t count_;
+  int32_t sample_total_;
+  bool is_histogram_;
+  uint8_t name_[kMaxNameSize];
+};
+
+
+// A set of counters and associated information.  An instance of this
+// class is stored directly in the memory-mapped counters file if
+// the --map-counters options is used
+class CounterCollection {
+ public:
+  CounterCollection();
+  Counter* GetNextCounter();
+ private:
+  static const unsigned kMaxCounters = 256;
+  uint32_t magic_number_;
+  uint32_t max_counters_;
+  uint32_t max_name_size_;
+  uint32_t counters_in_use_;
+  Counter counters_[kMaxCounters];
+};
+
+
+class CounterMap {
+ public:
+  CounterMap(): hash_map_(Match) { }
+  Counter* Lookup(const char* name) {
+    i::HashMap::Entry* answer = hash_map_.Lookup(
+        const_cast<char*>(name),
+        Hash(name),
+        false);
+    if (!answer) return NULL;
+    return reinterpret_cast<Counter*>(answer->value);
+  }
+  void Set(const char* name, Counter* value) {
+    i::HashMap::Entry* answer = hash_map_.Lookup(
+        const_cast<char*>(name),
+        Hash(name),
+        true);
+    ASSERT(answer != NULL);
+    answer->value = value;
+  }
+  class Iterator {
+   public:
+    explicit Iterator(CounterMap* map)
+        : map_(&map->hash_map_), entry_(map_->Start()) { }
+    void Next() { entry_ = map_->Next(entry_); }
+    bool More() { return entry_ != NULL; }
+    const char* CurrentKey() { return static_cast<const char*>(entry_->key); }
+    Counter* CurrentValue() { return static_cast<Counter*>(entry_->value); }
+   private:
+    i::HashMap* map_;
+    i::HashMap::Entry* entry_;
+  };
+ private:
+  static int Hash(const char* name);
+  static bool Match(void* key1, void* key2);
+  i::HashMap hash_map_;
+};
+
+
+class Shell: public i::AllStatic {
+ public:
+  static bool ExecuteString(Handle<String> source,
+                            Handle<Value> name,
+                            bool print_result,
+                            bool report_exceptions);
+  static void ReportException(TryCatch* try_catch);
+  static void Initialize();
+  static void OnExit();
+  static int* LookupCounter(const char* name);
+  static void* CreateHistogram(const char* name,
+                               int min,
+                               int max,
+                               size_t buckets);
+  static void AddHistogramSample(void* histogram, int sample);
+  static void MapCounters(const char* name);
+  static Handle<String> ReadFile(const char* name);
+  static void RunShell();
+  static int Main(int argc, char* argv[]);
+  static Handle<Array> GetCompletions(Handle<String> text,
+                                      Handle<String> full);
+  static Handle<Object> DebugMessageDetails(Handle<String> message);
+  static Handle<Value> DebugCommandToJSONRequest(Handle<String> command);
+
+  static Handle<Value> Print(const Arguments& args);
+  static Handle<Value> Yield(const Arguments& args);
+  static Handle<Value> Quit(const Arguments& args);
+  static Handle<Value> Version(const Arguments& args);
+  static Handle<Value> Load(const Arguments& args);
+  // The OS object on the global object contains methods for performing
+  // operating system calls:
+  //
+  // os.system("program_name", ["arg1", "arg2", ...], timeout1, timeout2) will
+  // run the command, passing the arguments to the program.  The standard output
+  // of the program will be picked up and returned as a multiline string.  If
+  // timeout1 is present then it should be a number.  -1 indicates no timeout
+  // and a positive number is used as a timeout in milliseconds that limits the
+  // time spent waiting between receiving output characters from the program.
+  // timeout2, if present, should be a number indicating the limit in
+  // milliseconds on the total running time of the program.  Exceptions are
+  // thrown on timeouts or other errors or if the exit status of the program
+  // indicates an error.
+  //
+  // os.chdir(dir) changes directory to the given directory.  Throws an
+  // exception/ on error.
+  //
+  // os.setenv(variable, value) sets an environment variable.  Repeated calls to
+  // this method leak memory due to the API of setenv in the standard C library.
+  //
+  // os.umask(alue) calls the umask system call and returns the old umask.
+  //
+  // os.mkdirp(name, mask) creates a directory.  The mask (if present) is anded
+  // with the current umask.  Intermediate directories are created if necessary.
+  // An exception is not thrown if the directory already exists.  Analogous to
+  // the "mkdir -p" command.
+  static Handle<Value> OSObject(const Arguments& args);
+  static Handle<Value> System(const Arguments& args);
+  static Handle<Value> ChangeDirectory(const Arguments& args);
+  static Handle<Value> SetEnvironment(const Arguments& args);
+  static Handle<Value> SetUMask(const Arguments& args);
+  static Handle<Value> MakeDirectory(const Arguments& args);
+  static Handle<Value> RemoveDirectory(const Arguments& args);
+
+  static void AddOSMethods(Handle<ObjectTemplate> os_template);
+
+  static Handle<Context> utility_context() { return utility_context_; }
+
+  static const char* kHistoryFileName;
+  static const char* kPrompt;
+ private:
+  static Persistent<Context> utility_context_;
+  static Persistent<Context> evaluation_context_;
+  static CounterMap* counter_map_;
+  // We statically allocate a set of local counters to be used if we
+  // don't want to store the stats in a memory-mapped file
+  static CounterCollection local_counters_;
+  static CounterCollection* counters_;
+  static i::OS::MemoryMappedFile* counters_file_;
+  static Counter* GetCounter(const char* name, bool is_histogram);
+};
+
+
+class LineEditor {
+ public:
+  enum Type { DUMB = 0, READLINE = 1 };
+  LineEditor(Type type, const char* name);
+  virtual ~LineEditor() { }
+
+  virtual i::SmartPointer<char> Prompt(const char* prompt) = 0;
+  virtual bool Open() { return true; }
+  virtual bool Close() { return true; }
+  virtual void AddHistory(const char* str) { }
+
+  const char* name() { return name_; }
+  static LineEditor* Get();
+ private:
+  Type type_;
+  const char* name_;
+  LineEditor* next_;
+  static LineEditor* first_;
+};
+
+
+}  // namespace v8
+
+
+#endif  // V8_D8_H_