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

chrome/browser/chromeos/ui/setting_level_bubble_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_CHROMEOS_UI_SETTING_LEVEL_BUBBLE_VIEW_H_
 #define CHROME_BROWSER_CHROMEOS_UI_SETTING_LEVEL_BUBBLE_VIEW_H_
 #pragma once
 
 #include "base/gtest_prod_util.h"
 #include "ui/views/view.h"
 
@@ skipping 20 matching lines @@
   // Change the icon that we're currently displaying.
   void SetIcon(SkBitmap* icon);
 
   // Set the progress bar to the specified level and redraw it.
   void SetLevel(double level);
 
   // Draw the progress bar in an enabled or disabled state.
   void SetEnabled(bool enabled);
 
   // views::View implementation:
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnPaint(gfx::CanvasSkia* canvas) OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual gfx::Size GetPreferredSize() OVERRIDE;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(SettingLevelBubbleTest, CreateAndUpdate);
 
   views::ProgressBar* progress_bar_;
   SkBitmap* icon_;  // not owned
 
   DISALLOW_COPY_AND_ASSIGN(SettingLevelBubbleView);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_UI_SETTING_LEVEL_BUBBLE_VIEW_H_