WIP: Surface Synchronization System

services/ui/surfaces/display_compositor.cc

 // Copyright 2015 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/surfaces/display_compositor.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 88 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK_NE(surface_handle, gpu::kNullSurfaceHandle);
   DCHECK_EQ(0u, compositor_frame_sinks_.count(frame_sink_id));
 
   std::unique_ptr<cc::SyntheticBeginFrameSource> begin_frame_source(
       new cc::DelayBasedBeginFrameSource(
           base::MakeUnique<cc::DelayBasedTimeSource>(task_runner_.get())));
   std::unique_ptr<cc::Display> display =
       CreateDisplay(frame_sink_id, surface_handle, begin_frame_source.get());
 
+  if (!manager_.lock_manager()) {
+    std::unique_ptr<cc::DisplayCompositorLockManager> lock_manager(
+        new cc::DisplayCompositorLockManager(&manager_,
+                                             begin_frame_source.get()));
+    manager_.SetLockManager(std::move(lock_manager));
+  }
+
   compositor_frame_sinks_[frame_sink_id] =
       base::MakeUnique<GpuDisplayCompositorFrameSink>(
           this, frame_sink_id, std::move(display),
           std::move(begin_frame_source), std::move(request),
           std::move(private_request), std::move(client),
           std::move(display_private_request));
 }
 
 void DisplayCompositor::CreateOffscreenCompositorFrameSink(
     const cc::FrameSinkId& frame_sink_id,
@@ skipping 60 matching lines @@
   DCHECK_GT(surface_info.device_scale_factor(), 0.0f);
 
   if (client_)
     client_->OnSurfaceCreated(surface_info);
 }
 
 void DisplayCompositor::OnSurfaceDamaged(const cc::SurfaceId& surface_id,
                                          bool* changed) {}
 
 }  // namespace ui