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

chrome/browser/chromeos/frame/bubble_frame_view.h

Index: chrome/browser/chromeos/frame/bubble_frame_view.h
diff --git a/chrome/browser/chromeos/frame/bubble_frame_view.h b/chrome/browser/chromeos/frame/bubble_frame_view.h
index 63b71924bd8e5c3dc58bd91d8030baea78b20478..b88eaeeb1f0834bbfc1d26f0eb16ade48c7cb4ae 100644
--- a/chrome/browser/chromeos/frame/bubble_frame_view.h
+++ b/chrome/browser/chromeos/frame/bubble_frame_view.h
@@ -1,4 +1,4 @@
-// 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.
 
@@ -49,7 +49,7 @@ class BubbleFrameView : public views::NonClientFrameView,
   virtual gfx::Insets GetInsets() const OVERRIDE;
   virtual gfx::Size GetPreferredSize() OVERRIDE;
   virtual void Layout() OVERRIDE;
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnPaint(gfx::CanvasSkia* canvas) OVERRIDE;
 
   // Overridden from views::ButtonListener:
   virtual void ButtonPressed(views::Button* sender, const views::Event& event)