Fix build on the "Linux Clang (ChromeOS dbg)" bot.

content/browser/renderer_host/render_widget_host_view.h

 // Copyright (c) 2011 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_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_H_
 #pragma once
 
 #if defined(OS_MACOSX)
 #include <OpenGL/OpenGL.h>
@@ skipping 91 matching lines @@
 
   // Moves all plugin windows as described in the given list.
   virtual void MovePluginWindows(
       const std::vector<webkit::npapi::WebPluginGeometry>& moves) = 0;
 
   // Actually set/take focus to/from the associated View component.
   virtual void Focus() = 0;
   virtual void Blur() = 0;
 
   // Returns true if the View currently has the focus.
-  virtual bool HasFocus() = 0;
+  virtual bool HasFocus() const = 0;
 
   // Shows/hides the view.  These must always be called together in pairs.
   // It is not legal to call Hide() multiple times in a row.
   virtual void Show() = 0;
   virtual void Hide() = 0;
 
   // Whether the view is showing.
   virtual bool IsShowing() = 0;
 
   // Retrieve the bounds of the View, in screen coordinates.
@@ skipping 229 matching lines @@
   // mouse position just as mouse lock was entered; the movement they report
   // indicates what the change in position of the mouse would be had it not been
   // locked.
   bool mouse_locked_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostView);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_H_