Make reftests work for sky.

sky/viewer/document_view.h

 // Copyright 2014 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_VIEWER_DOCUMENT_VIEW_H_
 #define SKY_VIEWER_DOCUMENT_VIEW_H_
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "mojo/public/cpp/application/lazy_interface_ptr.h"
@@ skipping 52 matching lines @@
 
   // sky::LayerHostClient
   mojo::Shell* GetShell() override;
   void BeginFrame(base::TimeTicks frame_time) override;
   void OnSurfaceIdAvailable(mojo::SurfaceIdPtr surface_id) override;
   // sky::LayerClient
   void PaintContents(SkCanvas* canvas, const gfx::Rect& clip) override;
 
   void StartDebuggerInspectorBackend();
 
+  void GetPixelsForTesting(std::vector<unsigned char>* pixels);
+
  private:
   // WebWidgetClient methods:
   void initializeLayerTreeView() override;
   void scheduleAnimation() override;
 
   // WebFrameClient methods:
   mojo::View* createChildFrame(const blink::WebURL& url) override;
   void frameDetached(blink::WebFrame*) override;
   blink::WebNavigationPolicy decidePolicyForNavigation(
     const blink::WebFrameClient::NavigationPolicyInfo& info) override;
@@ skipping 39 matching lines @@
   mojo::LazyInterfacePtr<mojo::NavigatorHost> navigator_host_;
   blink::WebView* web_view_;
   mojo::View* root_;
   mojo::ViewManagerClientFactory view_manager_client_factory_;
   InspectorServiceFactory inspector_service_factory_;
   scoped_ptr<LayerHost> layer_host_;
   scoped_refptr<Layer> root_layer_;
   scoped_ptr<ScriptRunner> script_runner_;
   scoped_ptr<InspectorHostImpl> inspector_host_;
   scoped_ptr<inspector::InspectorBackendMojo> inspector_backend_;
+  base::WeakPtrFactory<DocumentView> weak_factory_;
   int debugger_id_;
 
-  base::WeakPtrFactory<DocumentView> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(DocumentView);
 };
 
 }  // namespace sky
 
 #endif  // SKY_VIEWER_DOCUMENT_VIEW_H_