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

ui/views/controls/menu/menu_scroll_view_container.h

Index: ui/views/controls/menu/menu_scroll_view_container.h
diff --git a/ui/views/controls/menu/menu_scroll_view_container.h b/ui/views/controls/menu/menu_scroll_view_container.h
index 234c8f16feb59f74f2873db53611cf1bb628128d..7d33353054d0c4aae0572f3d55ff0ed996d91dc2 100644
--- a/ui/views/controls/menu/menu_scroll_view_container.h
+++ b/ui/views/controls/menu/menu_scroll_view_container.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.
 
@@ -24,7 +24,7 @@ class MenuScrollViewContainer : public View {
   View* scroll_up_button() const { return scroll_up_button_; }
 
   // View overrides.
-  virtual void OnPaintBackground(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnPaintBackground(gfx::CanvasSkia* canvas) OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual gfx::Size GetPreferredSize() OVERRIDE;
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;