Added STACK_ALLOCATED annotations according to the Blink GC plugin requirements.

Source/core/storage/StorageEvent.h

 /*
  * Copyright (C) 2008, 2009 Apple 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:
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 
 #include "core/events/Event.h"
 #include "heap/Handle.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class Storage;
 
 struct StorageEventInit : public EventInit {
-    STACK_ALLOCATED();
-public:
     StorageEventInit();
 
     String key;
     String oldValue;
     String newValue;
     String url;
     RefPtrWillBeMember<Storage> storageArea;
 };
 
 class StorageEvent FINAL : public Event {
@@ skipping 27 matching lines @@
     String m_key;
     String m_oldValue;
     String m_newValue;
     String m_url;
     RefPtrWillBePersistent<Storage> m_storageArea;
 };
 
 } // namespace WebCore
 
 #endif // StorageEvent_h