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

chrome/common/extensions/extension_action.h

-// 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.
 
 #ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_ACTION_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_ACTION_H_
 #pragma once
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "third_party/skia/include/core/SkColor.h"
 
 namespace gfx {
-class Canvas;
+class CanvasSkia;
 class Rect;
 }
 
 class GURL;
 class SkBitmap;
 
 // ExtensionAction encapsulates the state of a browser or page action.
 // Instances can have both global and per-tab state. If a property does not have
 // a per-tab value, the global value is used instead.
 class ExtensionAction {
@@ skipping 105 matching lines @@
   // Get the badge visibility for a tab, or the default badge visibility
   // if none was set.
   bool GetIsVisible(int tab_id) {
     return GetValue(&visible_, tab_id);
   }
 
   // Remove all tab-specific state.
   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>
   struct ValueTraits {
     static T CreateEmpty() {
       return T();
     }
   };
 
   template<class T>
@@ skipping 39 matching lines @@
 };
 
 template<>
 struct ExtensionAction::ValueTraits<int> {
   static int CreateEmpty() {
     return -1;
   }
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_ACTION_H_