Make IDL Callbacks non-refcounted by default

Source/core/dom/StringCallback.cpp

 /*
  * Copyright (C) 2010 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 23 matching lines @@
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/ExecutionContextTask.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 namespace {
 
 class DispatchCallbackTask : public ExecutionContextTask {
 public:
-    static PassOwnPtr<DispatchCallbackTask> create(PassRefPtr<StringCallback> callback, const String& data)
+    static PassOwnPtr<DispatchCallbackTask> create(PassOwnPtr<StringCallback> callback, const String& data)
     {
         return adoptPtr(new DispatchCallbackTask(callback, data));
     }
 
     virtual void performTask(ExecutionContext*)
     {
         m_callback->handleEvent(m_data);
     }
 
 private:
-    DispatchCallbackTask(PassRefPtr<StringCallback> callback, const String& data)
+    DispatchCallbackTask(PassOwnPtr<StringCallback> callback, const String& data)
         : m_callback(callback)
         , m_data(data)
     {
     }
 
-    RefPtr<StringCallback> m_callback;
+    OwnPtr<StringCallback> m_callback;
     const String m_data;
 };
 
 } // namespace
 
-void StringCallback::scheduleCallback(ExecutionContext* context, const String& data)
+void StringCallback::scheduleCallback(PassOwnPtr<StringCallback> callback, ExecutionContext* context, const String& data)
 {
-    context->postTask(DispatchCallbackTask::create(this, data));
+    context->postTask(DispatchCallbackTask::create(callback, data));
 }
 
 } // namespace WebCore