[Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/core/events/TextEvent.h

 /*
  * Copyright (C) 2007, 2008 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 40 matching lines @@
 
     const AtomicString& interfaceName() const override;
 
     bool isLineBreak() const { return m_inputType == TextEventInputLineBreak; }
     bool isComposition() const { return m_inputType == TextEventInputComposition; }
     bool isPaste() const { return m_inputType == TextEventInputPaste; }
     bool isDrop() const { return m_inputType == TextEventInputDrop; }
 
     bool shouldSmartReplace() const { return m_shouldSmartReplace; }
     bool shouldMatchStyle() const { return m_shouldMatchStyle; }
-    DocumentFragment* pastingFragment() const { return m_pastingFragment.get(); }
+    DocumentFragment* pastingFragment() const;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     TextEvent();
 
     TextEvent(PassRefPtrWillBeRawPtr<AbstractView>, const String& data, TextEventInputType = TextEventInputKeyboard);
     TextEvent(PassRefPtrWillBeRawPtr<AbstractView>, const String& data, PassRefPtrWillBeRawPtr<DocumentFragment>, bool shouldSmartReplace, bool shouldMatchStyle);
 
     TextEventInputType m_inputType;
     String m_data;
 
     RefPtrWillBeMember<DocumentFragment> m_pastingFragment;
     bool m_shouldSmartReplace;
     bool m_shouldMatchStyle;
 };
 
 inline bool isTextEvent(const Event& event)
 {
     return event.type() == EventTypeNames::textInput && event.hasInterface(EventNames::TextEvent);
 }
 
 DEFINE_TYPE_CASTS(TextEvent, Event, event, isTextEvent(*event), isTextEvent(event));
 
 } // namespace blink
 
 #endif // TextEvent_h