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

chrome/browser/chromeos/panels/panel_scroller_header.h

Index: chrome/browser/chromeos/panels/panel_scroller_header.h
diff --git a/chrome/browser/chromeos/panels/panel_scroller_header.h b/chrome/browser/chromeos/panels/panel_scroller_header.h
index 5a154e5489be5f7f8b69a24bf2ddb952ce6acfc1..93e9d4f320ce5e6f4e5bb8974a2d7daa6b57469f 100644
--- a/chrome/browser/chromeos/panels/panel_scroller_header.h
+++ b/chrome/browser/chromeos/panels/panel_scroller_header.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.
 
@@ -26,7 +26,7 @@ class PanelScrollerHeader : public views::View {
   virtual void OnMouseReleased(const views::MouseEvent& event) OVERRIDE;
   virtual void OnMouseCaptureLost() OVERRIDE;
   virtual gfx::Size GetPreferredSize() OVERRIDE;
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnPaint(gfx::CanvasSkia* canvas) OVERRIDE;
 
  private:
   // Non-owning pointer to our parent scroller object.