Mus+Ash: Unified BeginFrame Skeleton

services/ui/public/cpp/window_compositor_frame_sink.cc

 // Copyright 2014 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/public/cpp/window_compositor_frame_sink.h"
 
 #include "base/bind.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_sink_client.h"
 #include "gpu/ipc/client/gpu_channel_host.h"
@@ skipping 29 matching lines @@
   if (!cc::CompositorFrameSink::BindToClient(client))
     return false;
 
   DCHECK(!thread_checker_);
   thread_checker_.reset(new base::ThreadChecker());
   compositor_frame_sink_.Bind(std::move(compositor_frame_sink_info_));
   client_binding_.reset(
       new mojo::Binding<cc::mojom::MojoCompositorFrameSinkClient>(
           this, std::move(client_request_)));
 
-  // TODO(enne): Get this from the WindowSurface via ServerWindowSurface.
-  begin_frame_source_.reset(new cc::DelayBasedBeginFrameSource(
-      base::MakeUnique<cc::DelayBasedTimeSource>(
-          base::ThreadTaskRunnerHandle::Get().get())));
+  begin_frame_source_ = base::MakeUnique<cc::ExternalBeginFrameSource>(this);
 
   client->SetBeginFrameSource(begin_frame_source_.get());
   return true;
 }
 
 void WindowCompositorFrameSink::DetachFromClient() {
   client_->SetBeginFrameSource(nullptr);
   begin_frame_source_.reset();
   compositor_frame_sink_.reset();
   cc::CompositorFrameSink::DetachFromClient();
@@ skipping 22 matching lines @@
       client_request_(std::move(client_request)) {}
 
 void WindowCompositorFrameSink::DidReceiveCompositorFrameAck() {
   DCHECK(thread_checker_);
   DCHECK(thread_checker_->CalledOnValidThread());
   if (!client_)
     return;
   client_->DidReceiveCompositorFrameAck();
 }
 
+void WindowCompositorFrameSink::OnBeginFrame(
+    const cc::BeginFrameArgs& begin_frame_args) {
+  begin_frame_source_->OnBeginFrame(begin_frame_args);
+}
+
 void WindowCompositorFrameSink::ReclaimResources(
     const cc::ReturnedResourceArray& resources) {
   DCHECK(thread_checker_);
   DCHECK(thread_checker_->CalledOnValidThread());
   if (!client_)
     return;
   client_->ReclaimResources(resources);
 }
 
+void WindowCompositorFrameSink::OnNeedsBeginFrames(bool needs_begin_frames) {
+  compositor_frame_sink_->SetNeedsBeginFrame(needs_begin_frames);
+}
+
 WindowCompositorFrameSinkBinding::~WindowCompositorFrameSinkBinding() {}
 
 WindowCompositorFrameSinkBinding::WindowCompositorFrameSinkBinding(
     cc::mojom::MojoCompositorFrameSinkRequest compositor_frame_sink_request,
     mojo::InterfacePtrInfo<cc::mojom::MojoCompositorFrameSinkClient>
         compositor_frame_sink_client)
     : compositor_frame_sink_request_(std::move(compositor_frame_sink_request)),
       compositor_frame_sink_client_(std::move(compositor_frame_sink_client)) {}
 
 }  // namespace ui