Support tracking focused node element for OOPIFs.

content/renderer/render_frame_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 #define CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 845 matching lines @@
   void OnFind(int request_id,
               const base::string16& search_text,
               const blink::WebFindOptions& options);
   void OnClearActiveFindMatch();
   void OnStopFinding(StopFindAction action);
   void OnEnableViewSourceMode();
   void OnSuppressFurtherDialogs();
   void OnSetHasReceivedUserGesture();
   void OnFileChooserResponse(
       const std::vector<content::FileChooserFileInfo>& files);
+  void OnClearFocusedElement();
 #if defined(OS_ANDROID)
   void OnActivateNearestFindResult(int request_id, float x, float y);
   void OnGetNearestFindResult(int request_id, float x, float y);
   void OnFindMatchRects(int current_version);
 #endif
 
 #if defined(USE_EXTERNAL_POPUP_MENU)
 #if defined(OS_MACOSX)
   void OnSelectPopupMenuItem(int selected_index);
 #else
@@ skipping 464 matching lines @@
   bool browser_side_navigation_pending_ = false;
 
   base::WeakPtrFactory<RenderFrameImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_IMPL_H_