Allow CanvasSkia to bind to an existing SkCanvas.

views/aura_desktop/aura_desktop_main.cc

 // Copyright (c) 2011 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.
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/i18n/icu_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
@@ skipping 38 matching lines @@
   virtual bool OnMouseEvent(aura::MouseEvent* event) OVERRIDE {
     return true;
   }
   virtual bool ShouldActivate(aura::MouseEvent* event) OVERRIDE {
     return true;
   }
   virtual void OnActivated() OVERRIDE {}
   virtual void OnLostActive() OVERRIDE {}
   virtual void OnCaptureLost() OVERRIDE {}
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
-    canvas->AsCanvasSkia()->drawColor(color_, SkXfermode::kSrc_Mode);
+    canvas->GetSkCanvas()->drawColor(color_, SkXfermode::kSrc_Mode);
   }
   virtual void OnWindowDestroying() OVERRIDE {
   }
   virtual void OnWindowDestroyed() OVERRIDE {
   }
 
  private:
   SkColor color_;
 
   DISALLOW_COPY_AND_ASSIGN(DemoWindowDelegate);
@@ skipping 111 matching lines @@
       contents, window2, gfx::Rect(120, 150, 200, 200));
   views_window->Show();
 
   aura::Desktop::GetInstance()->Run();
 
   delete aura::Desktop::GetInstance();
 
   return 0;
 }