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

ui/views/controls/focusable_border.h

Index: ui/views/controls/focusable_border.h
diff --git a/ui/views/controls/focusable_border.h b/ui/views/controls/focusable_border.h
index 4b64bc60fa77cb27bc5722bfad38f6e1b3662182..a712b3fea4c929634f104a07f1f3760bc51fde7c 100644
--- a/ui/views/controls/focusable_border.h
+++ b/ui/views/controls/focusable_border.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.
 
@@ -12,7 +12,7 @@
 #include "ui/views/view.h"
 
 namespace gfx {
-class Canvas;
+class CanvasSkia;
 class Insets;
 }
 
@@ -32,7 +32,7 @@ class FocusableBorder : public Border {
   }
 
   // Overridden from Border:
-  virtual void Paint(const View& view, gfx::Canvas* canvas) const OVERRIDE;
+  virtual void Paint(const View& view, gfx::CanvasSkia* canvas) const OVERRIDE;
   virtual void GetInsets(gfx::Insets* insets) const OVERRIDE;
 
  private: