PreParser fix: propagate reference erros properly.

src/parser.h

 // Copyright 2012 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
@@ skipping 86 matching lines @@
   virtual const char* Data();
   virtual bool HasError();
 
   void Initialize();
   void ReadNextSymbolPosition();
 
   FunctionEntry GetFunctionEntry(int start);
   int GetSymbolIdentifier();
   bool SanityCheck();
 
-  Scanner::Location MessageLocation();
-  const char* BuildMessage();
-  Vector<const char*> BuildArgs();
+  Scanner::Location MessageLocation() const;
+  bool IsReferenceError() const;
+  const char* BuildMessage() const;
+  Vector<const char*> BuildArgs() const;
 
   int symbol_count() {
     return (store_.length() > PreparseDataConstants::kHeaderSize)
         ? store_[PreparseDataConstants::kSymbolCountOffset]
         : 0;
   }
   // The following functions should only be called if SanityCheck has
   // returned true.
   bool has_error() { return store_[PreparseDataConstants::kHasErrorOffset]; }
   unsigned magic() { return store_[PreparseDataConstants::kMagicOffset]; }
   unsigned version() { return store_[PreparseDataConstants::kVersionOffset]; }
 
  private:
   friend class v8::ScriptCompiler;
   Vector<unsigned> store_;
   unsigned char* symbol_data_;
   unsigned char* symbol_data_end_;
   int function_index_;
   bool owns_store_;
 
-  unsigned Read(int position);
-  unsigned* ReadAddress(int position);
+  unsigned Read(int position) const;
+  unsigned* ReadAddress(int position) const;
   // Reads a number from the current symbols
   int ReadNumber(byte** source);
 
   ScriptDataImpl(const char* backing_store, int length)
       : store_(reinterpret_cast<unsigned*>(const_cast<char*>(backing_store)),
                length / static_cast<int>(sizeof(unsigned))),
         owns_store_(false) {
     ASSERT_EQ(0, static_cast<int>(
         reinterpret_cast<intptr_t>(backing_store) % sizeof(unsigned)));
   }
@@ skipping 695 matching lines @@
  private:
   static const int kLiteralTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_