cc: Introduce BeginFrame sequence numbers and acknowledgements.

cc/blimp/layer_tree_host_remote.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 "cc/blimp/layer_tree_host_remote.h"
 
 #include "base/atomic_sequence_num.h"
 #include "base/auto_reset.h"
 #include "base/memory/ptr_util.h"
 #include "cc/blimp/compositor_proto_state.h"
@@ skipping 353 matching lines @@
   // Start the main frame. It should go till the requested pipeline stage.
   max_pipeline_stage_for_current_frame_ =
       requested_pipeline_stage_for_next_frame_;
   requested_pipeline_stage_for_next_frame_ = FramePipelineStage::NONE;
 
   client_->WillBeginMainFrame();
 
   current_pipeline_stage_ = FramePipelineStage::ANIMATE;
   base::TimeTicks now = base::TimeTicks::Now();
   client_->BeginMainFrame(BeginFrameArgs::Create(
-      BEGINFRAME_FROM_HERE, now, now + kDefaultFrameInterval,
+      BEGINFRAME_FROM_HERE,
+      static_cast<uint64_t>(reinterpret_cast<std::uintptr_t>(this)),
+      begin_frame_number_++, now, now + kDefaultFrameInterval,
       kDefaultFrameInterval, BeginFrameArgs::NORMAL));
   // We don't run any animations on the layer because threaded animations are
   // disabled.
   // TODO(khushalsagar): Revisit this when adding support for animations.
   client_->UpdateLayerTreeHost();
 
   current_pipeline_stage_ = FramePipelineStage::UPDATE_LAYERS;
   LayerList layer_list;
   if (max_pipeline_stage_for_current_frame_ >=
       FramePipelineStage::UPDATE_LAYERS) {
@@ skipping 141 matching lines @@
     layer->ToLayerPropertiesProto(layer_properties);
   }
 
   std::vector<PictureData> pictures =
       engine_picture_cache_->CalculateCacheUpdateAndFlush();
   proto::PictureDataVectorToSkPicturesProto(
       pictures, layer_tree_host_proto->mutable_pictures());
 }
 
 }  // namespace cc