Remove unused variable from Scanner class.

src/parser.cc

 // Copyright 2010 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 1421 matching lines @@
 // Implementation of Parser
 
 Parser::Parser(Handle<Script> script,
                bool allow_natives_syntax,
                v8::Extension* extension,
                ParserMode is_pre_parsing,
                ParserFactory* factory,
                ParserLog* log,
                ScriptDataImpl* pre_data)
     : script_(script),
-      scanner_(is_pre_parsing),
+      scanner_(),
       top_scope_(NULL),
       with_nesting_level_(0),
       temp_scope_(NULL),
       target_stack_(NULL),
       allow_natives_syntax_(allow_natives_syntax),
       extension_(extension),
       factory_(factory),
       log_(log),
       is_pre_parsing_(is_pre_parsing == PREPARSE),
       pre_data_(pre_data),
@@ skipping 4117 matching lines @@
       parser.ParseLazy(script_source, name,
                        start_position, end_position, is_expression);
   return result;
 }
 
 
 #undef NEW
 
 
 } }  // namespace v8::internal