Oilpan: Replace most of RefPtrs for Event objects with oilpan's transition types

Source/core/loader/FrameLoadRequest.h

 /*
  * Copyright (C) 2003, 2006, 2010 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 74 matching lines @@
 
     const SubstituteData& substituteData() const { return m_substituteData; }
 
     bool lockBackForwardList() const { return m_lockBackForwardList; }
     void setLockBackForwardList(bool lockBackForwardList) { m_lockBackForwardList = lockBackForwardList; }
 
     ClientRedirectPolicy clientRedirect() const { return m_clientRedirect; }
     void setClientRedirect(ClientRedirectPolicy clientRedirect) { m_clientRedirect = clientRedirect; }
 
     Event* triggeringEvent() const { return m_triggeringEvent.get(); }
-    void setTriggeringEvent(PassRefPtr<Event> triggeringEvent) { m_triggeringEvent = triggeringEvent; }
+    void setTriggeringEvent(PassRefPtrWillBeRawPtr<Event> triggeringEvent) { m_triggeringEvent = triggeringEvent; }
 
     FormState* formState() const { return m_formState.get(); }
     void setFormState(PassRefPtr<FormState> formState) { m_formState = formState; }
 
     ShouldSendReferrer shouldSendReferrer() const { return m_shouldSendReferrer; }
     void setShouldSendReferrer(ShouldSendReferrer shouldSendReferrer) { m_shouldSendReferrer = shouldSendReferrer; }
 
 private:
     RefPtr<Document> m_originDocument;
     ResourceRequest m_resourceRequest;
     AtomicString m_frameName;
     SubstituteData m_substituteData;
     bool m_lockBackForwardList;
     ClientRedirectPolicy m_clientRedirect;
-    RefPtr<Event> m_triggeringEvent;
+    RefPtrWillBePersistent<Event> m_triggeringEvent;
     RefPtr<FormState> m_formState;
     ShouldSendReferrer m_shouldSendReferrer;
 };
 
 }
 
 #endif // FrameLoadRequest_h