cc: Make separate interface for BeginFrame ipc from OutputSurface

content/renderer/android/synchronous_compositor_factory.h

Index: content/renderer/android/synchronous_compositor_factory.h
diff --git a/content/renderer/android/synchronous_compositor_factory.h b/content/renderer/android/synchronous_compositor_factory.h
index 9653bc265fd66d85f18eda043bb9968a60689939..6eb6430b511501db466621021faab512a0233079 100644
--- a/content/renderer/android/synchronous_compositor_factory.h
+++ b/content/renderer/android/synchronous_compositor_factory.h
@@ -14,6 +14,7 @@ class MessageLoopProxy;
 }
 
 namespace cc {
+class BeginFrameSource;
 class ContextProvider;
 class OutputSurface;
 }
@@ -52,6 +53,9 @@ class SynchronousCompositorFactory {
   // The factory maintains ownership of the returned interface.
   virtual InputHandlerManagerClient* GetInputHandlerManagerClient() = 0;
 
+  virtual scoped_ptr<cc::BeginFrameSource> CreateExternalBeginFrameSource(
+      int routing_id) = 0;
+
   virtual scoped_refptr<webkit::gpu::ContextProviderWebContext>
       CreateOffscreenContextProvider(
           const blink::WebGraphicsContext3D::Attributes& attributes,