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diff --git a/deps/v8/include/v8-preparser.h b/deps/v8/include/v8-preparser.h
new file mode 100644
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+++ b/deps/v8/include/v8-preparser.h
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+// Copyright 2010 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 PREPARSER_H
+#define PREPARSER_H
+
+#include "v8stdint.h"
+
+#ifdef _WIN32
+
+// Setup for Windows DLL export/import. When building the V8 DLL the
+// BUILDING_V8_SHARED needs to be defined. When building a program which uses
+// the V8 DLL USING_V8_SHARED needs to be defined. When either building the V8
+// static library or building a program which uses the V8 static library neither
+// BUILDING_V8_SHARED nor USING_V8_SHARED should be defined.
+#if defined(BUILDING_V8_SHARED) && defined(USING_V8_SHARED)
+#error both BUILDING_V8_SHARED and USING_V8_SHARED are set - please check the\
+  build configuration to ensure that at most one of these is set
+#endif
+
+#ifdef BUILDING_V8_SHARED
+#define V8EXPORT __declspec(dllexport)
+#elif USING_V8_SHARED
+#define V8EXPORT __declspec(dllimport)
+#else
+#define V8EXPORT
+#endif  // BUILDING_V8_SHARED
+
+#else  // _WIN32
+
+// Setup for Linux shared library export. There is no need to distinguish
+// between building or using the V8 shared library, but we should not
+// export symbols when we are building a static library.
+#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(V8_SHARED)
+#define V8EXPORT __attribute__ ((visibility("default")))
+#else  // defined(__GNUC__) && (__GNUC__ >= 4)
+#define V8EXPORT
+#endif  // defined(__GNUC__) && (__GNUC__ >= 4)
+
+#endif  // _WIN32
+
+
+namespace v8 {
+
+
+class PreParserData {
+ public:
+  PreParserData(size_t size, const uint8_t* data)
+      : data_(data), size_(size) { }
+
+  // Create a PreParserData value where stack_overflow reports true.
+  static PreParserData StackOverflow() { return PreParserData(NULL, 0); }
+  // Whether the pre-parser stopped due to a stack overflow.
+  // If this is the case, size() and data() should not be used.
+
+  bool stack_overflow() { return size_ == 0u; }
+
+  // The size of the data in bytes.
+  size_t size() const { return size_; }
+
+  // Pointer to the data.
+  const uint8_t* data() const { return data_; }
+
+ private:
+  const uint8_t* const data_;
+  const size_t size_;
+};
+
+
+// Interface for a stream of Unicode characters.
+class UnicodeInputStream {
+ public:
+  virtual ~UnicodeInputStream();
+
+  // Returns the next Unicode code-point in the input, or a negative value when
+  // there is no more input in the stream.
+  virtual int32_t Next() = 0;
+
+  // Pushes a read character back into the stream, so that it will be the next
+  // to be read by Advance(). The character pushed back must be the most
+  // recently read character that hasn't already been pushed back (i.e., if
+  // pushing back more than one character, they must occur in the opposite order
+  // of the one they were read in).
+  virtual void PushBack(int32_t ch) = 0;
+};
+
+
+// Preparse a JavaScript program. The source code is provided as a
+// UnicodeInputStream. The max_stack_size limits the amount of stack
+// space that the preparser is allowed to use. If the preparser uses
+// more stack space than the limit provided, the result's stack_overflow()
+// method will return true. Otherwise the result contains preparser
+// data that can be used by the V8 parser to speed up parsing.
+PreParserData V8EXPORT Preparse(UnicodeInputStream* input,
+                                size_t max_stack_size);
+
+}  // namespace v8.
+
+#endif  // PREPARSER_H