Revert 52600 - renderer_host: Remove CanBlur method....

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_
 
 #include <deque>
 #include <string>
 #include <vector>
@@ skipping 227 matching lines @@
   BackingStore* AllocBackingStore(const gfx::Size& size);
 
   // When a backing store does asynchronous painting, it will call this function
   // when it is done with the DIB. We will then forward a message to the
   // renderer to send another paint.
   void DonePaintingToBackingStore();
 
   // Returns the video layer if it exists, NULL otherwise.
   VideoLayer* video_layer() const { return video_layer_.get(); }
 
+  // Checks to see if we can give up focus to this widget through a JS call.
+  virtual bool CanBlur() const { return true; }
+
   // Starts a hang monitor timeout. If there's already a hang monitor timeout
   // the new one will only fire if it has a shorter delay than the time
   // left on the existing timeouts.
   void StartHangMonitorTimeout(base::TimeDelta delay);
 
   // Restart the active hang monitor timeout. Clears all existing timeouts and
   // starts with a new one.  This can be because the renderer has become
   // active, the tab is being hidden, or the user has chosen to wait some more
   // to give the tab a chance to become active and we don't want to display a
   // warning too soon.
@@ skipping 435 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_