Connect Sky and Ganesh in SkyShell

sky/shell/gpu_delegate.h

 // Copyright 2015 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.
 
 #ifndef SKY_SHELL_GPU_DELEGATE_H_
 #define SKY_SHELL_GPU_DELEGATE_H_
 
+#include "skia/ext/refptr.h"
 #include "ui/gfx/native_widget_types.h"
 
+class SkPicture;
+
 namespace sky {
 namespace shell {
 
 class GPUDelegate {
  public:
   virtual void OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget) = 0;
   virtual void OnOutputSurfaceDestroyed() = 0;
+  virtual void Draw(skia::RefPtr<SkPicture> picture) = 0;
 
  protected:
   virtual ~GPUDelegate();
 };
 
 }  // namespace shell
 }  // namespace sky
 
 #endif  // SKY_SHELL_GPU_DELEGATE_H_