Making window.focus() work in Chrome

chrome/browser/renderer_host/render_widget_host.h

 // Copyright (c) 2009 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 CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_H_
 #pragma once
 
 #include <deque>
 #include <string>
@@ skipping 463 matching lines @@
   void OnMsgRenderViewReady();
   void OnMsgRenderViewGone();
   void OnMsgClose();
   void OnMsgRequestMove(const gfx::Rect& pos);
   void OnMsgPaintAtSizeAck(int tag, const gfx::Size& size);
   void OnMsgUpdateRect(const ViewHostMsg_UpdateRect_Params& params);
   void OnMsgCreateVideo(const gfx::Size& size);
   void OnMsgUpdateVideo(TransportDIB::Id bitmap, const gfx::Rect& bitmap_rect);
   void OnMsgDestroyVideo();
   void OnMsgInputEventAck(const IPC::Message& message);
-  void OnMsgFocus();
-  void OnMsgBlur();
+  virtual void OnMsgFocus();
+  virtual void OnMsgBlur();
 
   void OnMsgSetCursor(const WebCursor& cursor);
   void OnMsgImeUpdateTextInputState(WebKit::WebTextInputType type,
                                     const gfx::Rect& caret_rect);
   void OnMsgImeCancelComposition();
 
   void OnMsgGpuRenderingActivated(bool activated);
 
 #if defined(OS_MACOSX)
   void OnMsgShowPopup(const ViewHostMsg_ShowPopup_Params& params);
@@ skipping 199 matching lines @@
   // we don't do it more than once.
   bool requested_accessibility_tree_;
 
   // Optional video YUV layer for used for out-of-process compositing.
   scoped_ptr<VideoLayer> video_layer_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHost);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_H_