Parser cleanup: PreParser doesn't need to produce symbol data any more.

src/preparser.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 1165 matching lines @@
   Expression ParseFunctionLiteral(
       Identifier name,
       Scanner::Location function_name_location,
       bool name_is_strict_reserved,
       bool is_generator,
       int function_token_pos,
       FunctionLiteral::FunctionType function_type,
       bool* ok);
   void ParseLazyFunctionLiteralBody(bool* ok);
 
-  // Logs the currently parsed literal as a symbol in the preparser data.
-  void LogSymbol();
-  // Log the currently parsed string literal.
-  Expression GetStringSymbol();
-
   bool CheckInOrOf(bool accept_OF);
 };
 
 template<class Traits>
 ParserBase<Traits>::FunctionState::FunctionState(
     FunctionState** function_state_stack,
     typename Traits::Type::Scope** scope_stack,
     typename Traits::Type::Scope* scope,
     typename Traits::Type::Zone* extra_param)
     : next_materialized_literal_index_(JSFunction::kLiteralsPrefixSize),
@@ skipping 976 matching lines @@
                                "accessor_get_set");
     }
     *ok = false;
   }
 }
 
 
 } }  // v8::internal
 
 #endif  // V8_PREPARSER_H