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

chrome/browser/ui/views/download/download_item_view.h

-// 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.
 //
 // A ChromeView that implements one download on the Download shelf.
 // Each DownloadItemView contains an application icon, a text label
 // indicating the download's file name, a text label indicating the
 // download's status (such as the number of bytes downloaded so far)
 // and a button for canceling an in progress download, or opening
 // the completed download.
 //
@@ skipping 84 matching lines @@
 
   // ButtonListener implementation.
   virtual void ButtonPressed(views::Button* sender,
                              const views::Event& event) OVERRIDE;
 
   // ui::AnimationDelegate implementation.
   virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
 
  protected:
   // Overridden from views::View:
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnPaint(gfx::CanvasSkia* canvas) OVERRIDE;
 
  private:
   enum State {
     NORMAL = 0,
     HOT,
     PUSHED
   };
 
   enum Mode {
     NORMAL_MODE = 0,        // Showing download item.
@@ skipping 21 matching lines @@
     SkBitmap* bottom;
   };
 
   void OpenDownload();
 
   void LoadIcon();
   void LoadIconIfItemPathChanged();
 
   // Convenience method to paint the 3 vertical bitmaps (bottom, middle, top)
   // that form the background.
-  void PaintBitmaps(gfx::Canvas* canvas,
+  void PaintBitmaps(gfx::CanvasSkia* canvas,
                     const SkBitmap* top_bitmap,
                     const SkBitmap* center_bitmap,
                     const SkBitmap* bottom_bitmap,
                     int x,
                     int y,
                     int height,
                     int width);
 
   // Sets the state and triggers a repaint.
   void SetState(State body_state, State drop_down_state);
@@ skipping 147 matching lines @@
 
   // The icon loaded in the download shelf is based on the file path of the
   // item.  Store the path used, so that we can detect a change in the path
   // and reload the icon.
   FilePath last_download_item_path_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_DOWNLOAD_DOWNLOAD_ITEM_VIEW_H__