Set up rewriting triggers

src/parsing/preparser.h

 // Copyright 2012 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_PREPARSER_H
 #define V8_PARSING_PREPARSER_H
 
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
 #include "src/hashmap.h"
@@ skipping 908 matching lines @@
                                            PreParserExpressionList args,
                                            int pos);
 
   inline void RewriteDestructuringAssignments() {}
 
   inline void QueueDestructuringAssignmentForRewriting(PreParserExpression) {}
 
   void SetFunctionNameFromPropertyName(PreParserExpression,
                                        PreParserIdentifier) {}
 
+  inline PreParserExpression RewriteExpression(PreParserExpression expr) {
+    return expr;
+  }
+  inline PreParserExpression RewriteObjectLiteralProperty(
+      PreParserExpression property) {
+    return property;
+  }
+
  private:
   PreParser* pre_parser_;
 };
 
 
 // Preparsing checks a JavaScript program and emits preparse-data that helps
 // a later parsing to be faster.
 // See preparse-data-format.h for the data format.
 
 // The PreParser checks that the syntax follows the grammar for JavaScript,
@@ skipping 187 matching lines @@
     const PreParserFormalParameters& parameters, FunctionKind kind,
     FunctionLiteral::FunctionType function_type, bool* ok) {
   return pre_parser_->ParseEagerFunctionBody(function_name, pos, parameters,
                                              kind, function_type, ok);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PREPARSER_H