Make IDL Callbacks non-refcounted by default

Source/modules/quota/StorageErrorCallback.h

 /*
  * Copyright (C) 2013 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 24 matching lines @@
 #include "core/dom/ExecutionContextTask.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
 class DOMError;
 
 typedef int ExceptionCode;
 
-class StorageErrorCallback : public RefCounted<StorageErrorCallback> {
+class StorageErrorCallback {
 public:
     virtual ~StorageErrorCallback() { }
     virtual bool handleEvent(DOMError*) = 0;
 
     class CallbackTask : public ExecutionContextTask {
     public:
-        static PassOwnPtr<CallbackTask> create(PassRefPtr<StorageErrorCallback> callback, ExceptionCode ec)
+        static PassOwnPtr<CallbackTask> create(PassOwnPtr<StorageErrorCallback> callback, ExceptionCode ec)
         {
             return adoptPtr(new CallbackTask(callback, ec));
         }
 
         virtual void performTask(ExecutionContext*);
 
     private:
-        CallbackTask(PassRefPtr<StorageErrorCallback>, ExceptionCode);
+        CallbackTask(PassOwnPtr<StorageErrorCallback>, ExceptionCode);
 
-        RefPtr<StorageErrorCallback> m_callback;
+        OwnPtr<StorageErrorCallback> m_callback;
         ExceptionCode m_ec;
     };
 };
 
 } // namespace WebCore
 
 #endif // StorageErrorCallback_h