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diff --git a/deps/v8/src/parsing/rewriter.h b/deps/v8/src/parsing/rewriter.h
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+++ b/deps/v8/src/parsing/rewriter.h
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+// Copyright 2011 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_PARSING_REWRITER_H_
+#define V8_PARSING_REWRITER_H_
+
+namespace v8 {
+namespace internal {
+
+class AstValueFactory;
+class DoExpression;
+class ParseInfo;
+class Parser;
+
+class Rewriter {
+ public:
+  // Rewrite top-level code (ECMA 262 "programs") so as to conservatively
+  // include an assignment of the value of the last statement in the code to
+  // a compiler-generated temporary variable wherever needed.
+  //
+  // Assumes code has been parsed and scopes have been analyzed.  Mutates the
+  // AST, so the AST should not continue to be used in the case of failure.
+  static bool Rewrite(ParseInfo* info);
+
+  // Rewrite a list of statements, using the same rules as a top-level program,
+  // to  ensure identical behaviour of completion result.
+  static bool Rewrite(Parser* parser, DoExpression* expr,
+                      AstValueFactory* factory);
+};
+
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_PARSING_REWRITER_H_