[cc] Pass on BeginFrameAcks from CompositorEBFS through RWHVAura, DFH.

content/browser/renderer_host/delegated_frame_host.cc

Index: content/browser/renderer_host/delegated_frame_host.cc
diff --git a/content/browser/renderer_host/delegated_frame_host.cc b/content/browser/renderer_host/delegated_frame_host.cc
index bec9b52fa28d9db9e282ff87965d270092a9c34b..52023b7c1fad14e27e9388b3cec552627cd0394b 100644
--- a/content/browser/renderer_host/delegated_frame_host.cc
+++ b/content/browser/renderer_host/delegated_frame_host.cc
@@ -832,7 +832,9 @@ void DelegatedFrameHost::OnNeedsBeginFrames(bool needs_begin_frames) {
   support_->SetNeedsBeginFrame(needs_begin_frames);
 }
 
-void DelegatedFrameHost::OnDidFinishFrame(const cc::BeginFrameAck& ack) {}
+void DelegatedFrameHost::OnDidFinishFrame(const cc::BeginFrameAck& ack) {
+  support_->DidFinishFrame(ack);
+}
 
 void DelegatedFrameHost::CreateCompositorFrameSinkSupport() {
   DCHECK(!support_);