cc: Introduce BeginFrame sequence numbers and acknowledgements.

services/ui/surfaces/gpu_compositor_frame_sink.cc

Index: services/ui/surfaces/gpu_compositor_frame_sink.cc
diff --git a/services/ui/surfaces/gpu_compositor_frame_sink.cc b/services/ui/surfaces/gpu_compositor_frame_sink.cc
index fe372ced204aee7046332873c0ac448303f20407..53ffd76022afa4d2b98752845827b30951cc84bb 100644
--- a/services/ui/surfaces/gpu_compositor_frame_sink.cc
+++ b/services/ui/surfaces/gpu_compositor_frame_sink.cc
@@ -66,6 +66,11 @@ void GpuCompositorFrameSink::Satisfy(const cc::SurfaceSequence& sequence) {
   support_.Satisfy(sequence);
 }
 
+void GpuCompositorFrameSink::BeginFrameDidNotDraw(
+    const cc::BeginFrameAck& ack) {
+  support_.BeginFrameDidNotDraw(ack);
+}
+
 void GpuCompositorFrameSink::DidReceiveCompositorFrameAck() {
   if (client_)
     client_->DidReceiveCompositorFrameAck();