[cc] Add and plumb CFS::DidNotProduceFrame.

services/ui/ws/frame_generator.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "services/ui/ws/frame_generator.h"
 
 #include <utility>
 #include <vector>
 
 #include "cc/output/compositor_frame.h"
@@ skipping 87 matching lines @@
 void FrameGenerator::SetExternalTilePriorityConstraints(
     const gfx::Rect& viewport_rect,
     const gfx::Transform& transform) {}
 
 void FrameGenerator::OnBeginFrame(const cc::BeginFrameArgs& begin_frame_args) {
   current_begin_frame_ack_ = cc::BeginFrameAck(
       begin_frame_args.source_id, begin_frame_args.sequence_number,
       begin_frame_args.sequence_number, false);
   if (begin_frame_args.type == cc::BeginFrameArgs::MISSED) {
     begin_frame_source_->DidFinishFrame(this, current_begin_frame_ack_);
+    compositor_frame_sink_->BeginFrameDidNotProduceFrame(
+        current_begin_frame_ack_);
     return;
   }
 
   current_begin_frame_ack_.has_damage = true;
   last_begin_frame_args_ = begin_frame_args;
 
   // TODO(fsamuel): We should add a trace for generating a top level frame.
   cc::CompositorFrame frame(GenerateCompositorFrame());
 
   compositor_frame_sink_->SubmitCompositorFrame(std::move(frame));
@@ skipping 88 matching lines @@
   observing_begin_frames_ = needs_begin_frame;
   if (needs_begin_frame)
     begin_frame_source_->AddObserver(this);
   else
     begin_frame_source_->RemoveObserver(this);
 }
 
 }  // namespace ws
 
 }  // namespace ui