[Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/core/editing/Editor.h

 /*
  * Copyright (C) 2006, 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 50 matching lines @@
 
 class CORE_EXPORT Editor final : public NoBaseWillBeGarbageCollectedFinalized<Editor> {
     USING_FAST_MALLOC_WILL_BE_REMOVED(Editor);
     WTF_MAKE_NONCOPYABLE(Editor);
 public:
     static PassOwnPtrWillBeRawPtr<Editor> create(LocalFrame&);
     ~Editor();
 
     EditorClient& client() const;
 
-    CompositeEditCommand* lastEditCommand() { return m_lastEditCommand.get(); }
+    CompositeEditCommand* lastEditCommand() const;
 
     void handleKeyboardEvent(KeyboardEvent*);
     bool handleTextEvent(TextEvent*);
 
     bool canEdit() const;
     bool canEditRichly() const;
 
     bool canDHTMLCut();
     bool canDHTMLCopy();
 
@@ skipping 219 matching lines @@
 
 inline bool Editor::markedTextMatchesAreHighlighted() const
 {
     return m_areMarkedTextMatchesHighlighted;
 }
 
 
 } // namespace blink
 
 #endif // Editor_h