Oilpan: remove now-addressed PostMessageTimer fixme.

Source/core/frame/LocalDOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 171 matching lines @@
 
 private:
     virtual void fired() override
     {
         InspectorInstrumentationCookie cookie = InspectorInstrumentation::traceAsyncOperationCompletedCallbackStarting(executionContext(), m_asyncOperationId);
         m_window->postMessageTimerFired(this);
         // This object is deleted now.
         InspectorInstrumentation::traceAsyncCallbackCompleted(cookie);
     }
 
-    // FIXME: Oilpan: This raw pointer is safe because the PostMessageTimer is
-    // owned by the LocalDOMWindow. Ideally PostMessageTimer should be moved to
-    // the heap and use Member<LocalDOMWindow>.
     RawPtrWillBeMember<LocalDOMWindow> m_window;
     RefPtr<SerializedScriptValue> m_message;
     String m_origin;
     RefPtrWillBeMember<LocalDOMWindow> m_source;
     OwnPtr<MessagePortChannelArray> m_channels;
     RefPtr<SecurityOrigin> m_targetOrigin;
     RefPtrWillBeMember<ScriptCallStack> m_stackTrace;
     RefPtr<UserGestureToken> m_userGestureToken;
     int m_asyncOperationId;
 };
@@ skipping 1552 matching lines @@
     return m_frameObserver->frame();
 }
 
 v8::Handle<v8::Object> LocalDOMWindow::wrap(v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     ASSERT_NOT_REACHED(); // LocalDOMWindow has [Custom=ToV8].
     return v8::Handle<v8::Object>();
 }
 
 } // namespace blink