New class for Date objects: caches individual date components.

src/api.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 4683 matching lines @@
   EXCEPTION_BAILOUT_CHECK(isolate, Local<v8::Value>());
   return Utils::ToLocal(obj);
 }
 
 
 double v8::Date::NumberValue() const {
   i::Isolate* isolate = i::Isolate::Current();
   if (IsDeadCheck(isolate, "v8::Date::NumberValue()")) return 0;
   LOG_API(isolate, "Date::NumberValue");
   i::Handle<i::Object> obj = Utils::OpenHandle(this);
-  i::Handle<i::JSValue> jsvalue = i::Handle<i::JSValue>::cast(obj);
-  return jsvalue->value()->Number();
+  i::Handle<i::JSDate> jsdate = i::Handle<i::JSDate>::cast(obj);
+  return jsdate->value()->Number();
 }
 
 
 void v8::Date::DateTimeConfigurationChangeNotification() {
   i::Isolate* isolate = i::Isolate::Current();
   ON_BAILOUT(isolate, "v8::Date::DateTimeConfigurationChangeNotification()",
              return);
   LOG_API(isolate, "Date::DateTimeConfigurationChangeNotification");
   ENTER_V8(isolate);
 
@@ skipping 1450 matching lines @@
 
 
 char* HandleScopeImplementer::Iterate(ObjectVisitor* v, char* storage) {
   HandleScopeImplementer* scope_implementer =
       reinterpret_cast<HandleScopeImplementer*>(storage);
   scope_implementer->IterateThis(v);
   return storage + ArchiveSpacePerThread();
 }
 
 } }  // namespace v8::internal