[cc] Add and plumb CFS::DidNotProduceFrame.

content/renderer/gpu/compositor_external_begin_frame_source.cc

Index: content/renderer/gpu/compositor_external_begin_frame_source.cc
diff --git a/content/renderer/gpu/compositor_external_begin_frame_source.cc b/content/renderer/gpu/compositor_external_begin_frame_source.cc
index 4c1608158b3c2d6f16de7fea4befde456b3b9b55..8041855a6a1b45c9fd9d251e2f07f48b21ea5787 100644
--- a/content/renderer/gpu/compositor_external_begin_frame_source.cc
+++ b/content/renderer/gpu/compositor_external_begin_frame_source.cc
@@ -71,12 +71,7 @@ void CompositorExternalBeginFrameSource::OnNeedsBeginFrames(
 }
 
 void CompositorExternalBeginFrameSource::OnDidFinishFrame(
-    const cc::BeginFrameAck& ack) {
-  DCHECK_LE(cc::BeginFrameArgs::kStartingFrameNumber, ack.sequence_number);
-  // If there was damage, ViewHostMsg_SwapCompositorFrame includes the ack.
-  if (!ack.has_damage)
-    Send(new ViewHostMsg_BeginFrameDidNotSwap(routing_id_, ack));
-}
+    const cc::BeginFrameAck& ack) {}
 
 void CompositorExternalBeginFrameSource::OnMessageReceived(
     const IPC::Message& message) {