Remove uses of external begin frame sources

content/renderer/android/synchronous_compositor_output_surface.h

Index: content/renderer/android/synchronous_compositor_output_surface.h
diff --git a/content/renderer/android/synchronous_compositor_output_surface.h b/content/renderer/android/synchronous_compositor_output_surface.h
index de8f1f0f56f99ee80b9f8851b3f4f2a18c3f667a..3009544932981fb86b04e653c7a31dd7c9d43752 100644
--- a/content/renderer/android/synchronous_compositor_output_surface.h
+++ b/content/renderer/android/synchronous_compositor_output_surface.h
@@ -71,6 +71,7 @@ class SynchronousCompositorOutputSurface
       scoped_refptr<cc::ContextProvider> worker_context_provider,
       int routing_id,
       uint32_t output_surface_id,
+      std::unique_ptr<cc::BeginFrameSource> begin_frame_source,
       SynchronousCompositorRegistry* registry,
       scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue);
   ~SynchronousCompositorOutputSurface() override;
@@ -161,6 +162,7 @@ class SynchronousCompositorOutputSurface
   std::unique_ptr<cc::Display> display_;
   // Owned by |display_|.
   SoftwareOutputSurface* software_output_surface_ = nullptr;
+  std::unique_ptr<cc::BeginFrameSource> begin_frame_source_;
 
   base::ThreadChecker thread_checker_;