Re-enable Parser::symbol_cache_ (after a long time!)

src/preparser.cc

 // Copyright 2011 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 1166 matching lines @@
         LogSymbol();
         break;
       case Token::NUMBER:
         Consume(next);
         checker.CheckProperty(next, kValueProperty, CHECK_OK);
         break;
       default:
         if (Token::IsKeyword(next)) {
           Consume(next);
           checker.CheckProperty(next, kValueProperty, CHECK_OK);
+          LogSymbol();
         } else {
           // Unexpected token.
           *ok = false;
           return Expression::Default();
         }
     }
 
     Expect(Token::COLON, CHECK_OK);
     ParseAssignmentExpression(true, CHECK_OK);
 
@@ skipping 179 matching lines @@
   int identifier_pos = position();
   if (scanner()->is_literal_ascii()) {
     log_->LogAsciiSymbol(identifier_pos, scanner()->literal_ascii_string());
   } else {
     log_->LogUtf16Symbol(identifier_pos, scanner()->literal_utf16_string());
   }
 }
 
 
 } }  // v8::internal