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

chrome/browser/ui/views/sad_tab_view.h

Index: chrome/browser/ui/views/sad_tab_view.h
diff --git a/chrome/browser/ui/views/sad_tab_view.h b/chrome/browser/ui/views/sad_tab_view.h
index a3dcbc4267c46043cb3e1e3ebcba809e2a7cdbc1..2704756b932fdeb0c24ba3ae24e633aea76c2210 100644
--- a/chrome/browser/ui/views/sad_tab_view.h
+++ b/chrome/browser/ui/views/sad_tab_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.
 
@@ -62,7 +62,7 @@ class SadTabView : public 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);