Disable retroactive begin frame for synchronous compositor

content/browser/android/in_process/synchronous_compositor_output_surface.cc

Index: content/browser/android/in_process/synchronous_compositor_output_surface.cc
diff --git a/content/browser/android/in_process/synchronous_compositor_output_surface.cc b/content/browser/android/in_process/synchronous_compositor_output_surface.cc
index ec8e6a31f421e3c63f3d838f9a010b759363a3f9..2d3768566734f66922cb09333a7e81cfe4478d5f 100644
--- a/content/browser/android/in_process/synchronous_compositor_output_surface.cc
+++ b/content/browser/android/in_process/synchronous_compositor_output_surface.cc
@@ -227,6 +227,11 @@ void SynchronousCompositorOutputSurface::InvokeComposite(
     OnSwapBuffersComplete(NULL);
 }
 
+void SynchronousCompositorOutputSurface::PostCheckForRetroactiveBeginFrame() {
+  // Synchronous compositor cannot perform retroactive begin frames, so
+  // intentionally no-op here.
+}
+
 // Not using base::NonThreadSafe as we want to enforce a more exacting threading
 // requirement: SynchronousCompositorOutputSurface() must only be used on the UI
 // thread.
@@ -234,6 +239,7 @@ bool SynchronousCompositorOutputSurface::CalledOnValidThread() const {
   return BrowserThread::CurrentlyOn(BrowserThread::UI);
 }
 
+

[brianderson, 2013/06/20 23:42:21]

nit: whitespace

 SynchronousCompositorOutputSurfaceDelegate*
 SynchronousCompositorOutputSurface::GetDelegate() {
   return SynchronousCompositorImpl::FromRoutingID(routing_id_);