bindings: Removes two FIXMEs because setReturnValueFast is useful.

Source/bindings/core/v8/DOMDataStore.h

 /*
  * Copyright (C) 2009 Google Inc. 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
@@ skipping 47 matching lines @@
 
     static DOMDataStore& current(v8::Isolate* isolate)
     {
         return DOMWrapperWorld::current(isolate).domDataStore();
     }
 
     static bool setReturnValueFast(v8::ReturnValue<v8::Value> returnValue, ScriptWrappable* object, v8::Local<v8::Object> holder, const ScriptWrappable* wrappable)
     {
         // The second fastest way to check if we're in the main world is to check if
         // the wrappable's wrapper is the same as the holder.
-        // FIXME: Investigate if it's worth having this check for performance.
         if (holderContainsWrapper(holder, wrappable))
             return object->setReturnValue(returnValue);
         return current(returnValue.GetIsolate()).setReturnValueFrom(returnValue, object);
     }
 
     static bool setReturnValueFast(v8::ReturnValue<v8::Value> returnValue, Node* node, v8::Local<v8::Object> holder, const ScriptWrappable* wrappable)
     {
         if (canUseScriptWrappable(node)
             // The second fastest way to check if we're in the main world is to
             // check if the wrappable's wrapper is the same as the holder.
-            // FIXME: Investigate if it's worth having this check for performance.
             || holderContainsWrapper(holder, wrappable))
             return ScriptWrappable::fromNode(node)->setReturnValue(returnValue);
         return current(returnValue.GetIsolate()).setReturnValueFrom(returnValue, ScriptWrappable::fromNode(node));
     }
 
     static bool setReturnValue(v8::ReturnValue<v8::Value> returnValue, ScriptWrappableBase* object)
     {
         return current(returnValue.GetIsolate()).setReturnValueFrom(returnValue, object);
     }
 
@@ skipping 186 matching lines @@
     v8::UniquePersistent<v8::Object> value,
     ScriptWrappableBase* key)
 {
     RELEASE_ASSERT(!value.IsEmpty()); // See crbug.com/368095.
     releaseObject(v8::Local<v8::Object>::New(isolate, value));
 }
 
 } // namespace blink
 
 #endif // DOMDataStore_h