ui/gfx: Make gfx::Canvas inherit from gfx::CanvasSkia.

chrome/browser/ui/views/sad_tab_view.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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_UI_VIEWS_SAD_TAB_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_SAD_TAB_VIEW_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/views/controls/button/button.h"
@@ skipping 43 matching lines @@
 
   // Overridden from views::ButtonListener:
   virtual void ButtonPressed(views::Button* source,
                              const views::Event& event) OVERRIDE;
 
  protected:
   // Overridden from views::View:
   virtual void ViewHierarchyChanged(bool is_add,
                                     views::View* parent,
                                     views::View* child) OVERRIDE;
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnPaint(gfx::CanvasSkia* canvas) OVERRIDE;
 
  private:
   views::Label* CreateLabel(const string16& text);
   views::Link* CreateLink(const string16& text);
 
   content::WebContents* web_contents_;
   Kind kind_;
   bool painted_;
   const gfx::Font& base_font_;
   views::Label* message_;
   views::Link* help_link_;
   views::Link* feedback_link_;
   views::TextButton* reload_button_;
 
   DISALLOW_COPY_AND_ASSIGN(SadTabView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_SAD_TAB_VIEW_H__