[Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/web/WebLocalFrameImpl.h

 /*
  * Copyright (C) 2009 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 269 matching lines @@
 
     // If the frame hosts a PluginDocument, this method returns the WebPluginContainerImpl
     // that hosts the plugin. If the provided node is a plugin, then it runs its
     // WebPluginContainerImpl.
     static WebPluginContainerImpl* pluginContainerFromNode(LocalFrame*, const WebNode&);
 
     WebViewImpl* viewImpl() const;
 
     FrameView* frameView() const { return frame() ? frame()->view() : 0; }
 
-    WebDevToolsAgentImpl* devToolsAgentImpl() const { return m_devToolsAgent.get(); }
+    WebDevToolsAgentImpl* devToolsAgentImpl() const;
 
     // Getters for the impls corresponding to Get(Provisional)DataSource. They
     // may return 0 if there is no corresponding data source.
     WebDataSourceImpl* dataSourceImpl() const;
     WebDataSourceImpl* provisionalDataSourceImpl() const;
 
     // Returns which frame has an active match. This function should only be
     // called on the main frame, as it is the only frame keeping track. Returned
     // value can be 0 if no frame has an active match.
     WebLocalFrameImpl* activeMatchFrame() const;
@@ skipping 101 matching lines @@
     // cleared upon close().
     SelfKeepAlive<WebLocalFrameImpl> m_selfKeepAlive;
 #endif
 };
 
 DEFINE_TYPE_CASTS(WebLocalFrameImpl, WebFrame, frame, frame->isWebLocalFrame(), frame.isWebLocalFrame());
 
 } // namespace blink
 
 #endif