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

ui/views/window/dialog_client_view.h

Index: ui/views/window/dialog_client_view.h
diff --git a/ui/views/window/dialog_client_view.h b/ui/views/window/dialog_client_view.h
index 91b357ccbae1eb40836899cab87abc6f76aea5cd..f5137334694f7744a70a45f8574758419eb69e0d 100644
--- a/ui/views/window/dialog_client_view.h
+++ b/ui/views/window/dialog_client_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.
 
@@ -83,8 +83,8 @@ class VIEWS_EXPORT DialogClientView : public ClientView,
 
  protected:
   // View overrides:
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
-  virtual void PaintChildren(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnPaint(gfx::CanvasSkia* canvas) OVERRIDE;
+  virtual void PaintChildren(gfx::CanvasSkia* canvas) OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual void ViewHierarchyChanged(bool is_add, View* parent,
                                     View* child) OVERRIDE;
@@ -98,7 +98,7 @@ class VIEWS_EXPORT DialogClientView : public ClientView,
  private:
   // Paint the size box in the bottom right corner of the window if it is
   // resizable.
-  void PaintSizeBox(gfx::Canvas* canvas);
+  void PaintSizeBox(gfx::CanvasSkia* canvas);
 
   // Returns the width of the specified dialog button using the correct font.
   int GetButtonWidth(int button) const;