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

chrome/common/extensions/extension_action.h

Index: chrome/common/extensions/extension_action.h
diff --git a/chrome/common/extensions/extension_action.h b/chrome/common/extensions/extension_action.h
index a1e5bc4a35adc061942eab000108347fcb3607b2..81907501d8525a1530ca154a178f1a76f7d138a0 100644
--- a/chrome/common/extensions/extension_action.h
+++ b/chrome/common/extensions/extension_action.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 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.
 
@@ -14,7 +14,7 @@
 #include "third_party/skia/include/core/SkColor.h"
 
 namespace gfx {
-class Canvas;
+class CanvasSkia;
 class Rect;
 }
 
@@ -140,7 +140,7 @@ class ExtensionAction {
   void ClearAllValuesForTab(int tab_id);
 
   // If the specified tab has a badge, paint it into the provided bounds.
-  void PaintBadge(gfx::Canvas* canvas, const gfx::Rect& bounds, int tab_id);
+  void PaintBadge(gfx::CanvasSkia* canvas, const gfx::Rect& bounds, int tab_id);
 
  private:
   template <class T>