Move default begin frame sources out to mus

services/ui/public/cpp/output_surface.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/output_surface.h"
 
 #include "base/bind.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/output_surface_client.h"
 #include "gpu/ipc/client/gpu_channel_host.h"
 #include "services/ui/public/cpp/context_provider.h"
+#include "services/ui/public/cpp/gpu_service.h"
 #include "services/ui/public/cpp/window_surface.h"
 
 namespace ui {
 
 OutputSurface::OutputSurface(
     scoped_refptr<gpu::GpuChannelHost> gpu_channel_host,
     std::unique_ptr<ui::WindowSurface> surface)
     : cc::OutputSurface(
           make_scoped_refptr(new ContextProvider(std::move(gpu_channel_host))),
           nullptr,
           nullptr),
       surface_(std::move(surface)) {
   capabilities_.delegated_rendering = true;
 }
 
 OutputSurface::~OutputSurface() {}
 
 bool OutputSurface::BindToClient(cc::OutputSurfaceClient* client) {
   surface_->BindToThread();
   surface_->set_client(this);
+
+  // TODO(enne): Get this from the WindowSurface via ServerWindowSurface.
+  begin_frame_source_.reset(new cc::DelayBasedBeginFrameSource(
+      base::MakeUnique<cc::DelayBasedTimeSource>(
+          base::ThreadTaskRunnerHandle::Get().get())));
+
+  client->SetBeginFrameSource(begin_frame_source_.get());
   return cc::OutputSurface::BindToClient(client);
 }
 
 void OutputSurface::DetachFromClient() {
+  client_->SetBeginFrameSource(nullptr);
+  begin_frame_source_.reset();
   surface_.reset();
   cc::OutputSurface::DetachFromClient();
 }
 
 void OutputSurface::BindFramebuffer() {
   // This is a delegating output surface, no framebuffer/direct drawing support.
   NOTREACHED();
 }
 
 uint32_t OutputSurface::GetFramebufferCopyTextureFormat() {
@@ skipping 15 matching lines @@
     ui::WindowSurface* surface,
     mojo::Array<cc::ReturnedResource> resources) {
   ReclaimResources(resources.To<cc::ReturnedResourceArray>());
 }
 
 void OutputSurface::SwapBuffersComplete() {
   client_->DidSwapBuffersComplete();
 }
 
 }  // namespace ui