Implemented printToSkPicture without using WebViewBenchmarkSupport.

content/renderer/gpu/render_widget_compositor.h

Index: content/renderer/gpu/render_widget_compositor.h
diff --git a/content/renderer/gpu/render_widget_compositor.h b/content/renderer/gpu/render_widget_compositor.h
index a1cc4ab954ee3cead8b33b969831ea3c28fbb694..689d2d72918e3cd3ef633c5b8218c55e6fb23840 100644
--- a/content/renderer/gpu/render_widget_compositor.h
+++ b/content/renderer/gpu/render_widget_compositor.h
@@ -20,6 +20,7 @@ struct LatencyInfo;
 
 namespace cc {
 class InputHandler;
+class Layer;
 class LayerTreeHost;
 }
 
@@ -51,6 +52,7 @@ class RenderWidgetCompositor : public WebKit::WebLayerTreeView,
   void SetLatencyInfo(const ui::LatencyInfo& latency_info);
   int GetLayerTreeId() const;
   void NotifyInputThrottledUntilCommit();
+  const cc::Layer* GetRootLayer() const;

[Ken Russell (switch to Gerrit), 2013/08/21 04:56:26]

Was there a reason this was hidden before? If so, should it remain hidden for
most callers, and the GpuBenchmarkingExtension made a friend?

[alokp, 2013/08/22 04:45:40]

I do not know if it was hidden on purpose. Probably nobody needed it. I am only
exposing the const pointer, which should be OK.

 
   // WebLayerTreeView implementation.
   virtual void setSurfaceReady();