Remove useless ZoneScopes from Parser.

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 544 matching lines @@
     ~ParsingModeScope() {
       parser_->mode_ = old_mode_;
     }
 
    private:
     Parser* parser_;
     Mode old_mode_;
   };
 
   FunctionLiteral* ParseLazy();
-  FunctionLiteral* ParseLazy(Utf16CharacterStream* source,
-                             ZoneScope* zone_scope);
+  FunctionLiteral* ParseLazy(Utf16CharacterStream* source);
 
   Isolate* isolate() { return isolate_; }
   Zone* zone() const { return zone_; }
   CompilationInfo* info() const { return info_; }
 
   // Called by ParseProgram after setting up the scanner.
   FunctionLiteral* DoParseProgram(CompilationInfo* info,
-                                  Handle<String> source,
-                                  ZoneScope* zone_scope);
+                                  Handle<String> source);
 
   // Report syntax error
   void ReportUnexpectedToken(Token::Value token);
   void ReportInvalidPreparseData(Handle<String> name, bool* ok);
   void ReportMessage(const char* message, Vector<const char*> args);
   void ReportMessage(const char* message, Vector<Handle<String> > args);
 
   void set_pre_parse_data(ScriptDataImpl *data) {
     pre_parse_data_ = data;
     symbol_cache_.Initialize(data ? data->symbol_count() : 0, zone());
@@ skipping 314 matching lines @@
  private:
   static const int kLiteralTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_