sync compositor: Remove begin frame source

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 81ab6b6d916ff9cbfa1aa0576d24dd21ca4a66a1..1e16e9268384bf186adc18f163545a9f19364dbe 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -164,7 +164,6 @@
 
 #if defined(OS_ANDROID)
 #include <cpu-features.h>
-#include "content/renderer/android/synchronous_compositor_external_begin_frame_source.h"
 #include "content/renderer/android/synchronous_compositor_filter.h"
 #include "content/renderer/media/android/renderer_demuxer_android.h"
 #include "content/renderer/media/android/stream_texture_factory.h"
@@ -1600,12 +1599,6 @@ scheduler::RendererScheduler* RenderThreadImpl::GetRendererScheduler() {
 
 std::unique_ptr<cc::BeginFrameSource>
 RenderThreadImpl::CreateExternalBeginFrameSource(int routing_id) {
-#if defined(OS_ANDROID)
-  if (sync_compositor_message_filter_) {
-    return base::WrapUnique(new SynchronousCompositorExternalBeginFrameSource(
-        routing_id, sync_compositor_message_filter_.get()));
-  }
-#endif
   return base::WrapUnique(new CompositorExternalBeginFrameSource(
       compositor_message_filter_.get(), sync_message_filter(), routing_id));
 }