Avoid bool to Oddball conversions by being lazy.

src/parser.cc

 // 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 3194 matching lines @@
   Token::Value op = peek();
   if (Token::IsUnaryOp(op)) {
     op = Next();
     int position = scanner().location().beg_pos;
     Expression* expression = ParseUnaryExpression(CHECK_OK);
 
     if (expression != NULL && (expression->AsLiteral() != NULL)) {
       Handle<Object> literal = expression->AsLiteral()->handle();
       if (op == Token::NOT) {
         // Convert the literal to a boolean condition and negate it.
-        bool condition = literal->ToBoolean()->IsTrue();
+        bool condition = literal->BooleanValue();
         Handle<Object> result(isolate()->heap()->ToBoolean(!condition),
                               isolate());
         return factory()->NewLiteral(result);
       } else if (literal->IsNumber()) {
         // Compute some expressions involving only number literals.
         double value = literal->Number();
         switch (op) {
           case Token::ADD:
             return expression;
           case Token::SUB:
@@ skipping 2706 matching lines @@
       ASSERT(info->isolate()->has_pending_exception());
     } else {
       result = parser.ParseProgram();
     }
   }
   info->SetFunction(result);
   return (result != NULL);
 }
 
 } }  // namespace v8::internal