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

chrome/browser/ui/views/tabs/dragged_tab_view.h

Index: chrome/browser/ui/views/tabs/dragged_tab_view.h
diff --git a/chrome/browser/ui/views/tabs/dragged_tab_view.h b/chrome/browser/ui/views/tabs/dragged_tab_view.h
index 89339b9859383b028186346f95b6c4731677c653..515046ac6684834511e1cde90951145cdef1d884 100644
--- a/chrome/browser/ui/views/tabs/dragged_tab_view.h
+++ b/chrome/browser/ui/views/tabs/dragged_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.
 
@@ -41,15 +41,15 @@ class DraggedTabView : public views::View {
 
  private:
   // Overridden from views::View:
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnPaint(gfx::CanvasSkia* canvas) OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual gfx::Size GetPreferredSize() OVERRIDE;
 
   // Paint the view, when it's not attached to any TabStrip.
-  void PaintDetachedView(gfx::Canvas* canvas);
+  void PaintDetachedView(gfx::CanvasSkia* canvas);
 
   // Paint the view, when "Show window contents while dragging" is disabled.
-  void PaintFocusRect(gfx::Canvas* canvas);
+  void PaintFocusRect(gfx::CanvasSkia* canvas);
 
   // Returns the preferred size of the container.
   gfx::Size PreferredContainerSize();