Moves ownership of the cc::Display's BeginFrameSource out of Display.

cc/surfaces/compositor_frame_sink_support.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/surfaces/compositor_frame_sink_support.h"
 
 #include "cc/output/compositor_frame.h"
 #include "cc/scheduler/begin_frame_source.h"
 #include "cc/surfaces/compositor_frame_sink_support_client.h"
 #include "cc/surfaces/display.h"
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_manager.h"
 
 namespace cc {
 
 CompositorFrameSinkSupport::CompositorFrameSinkSupport(
     CompositorFrameSinkSupportClient* client,
     SurfaceManager* surface_manager,
     const FrameSinkId& frame_sink_id,
-    std::unique_ptr<Display> display)
+    std::unique_ptr<Display> display,
+    std::unique_ptr<BeginFrameSource> display_begin_frame_source)
     : client_(client),
       surface_manager_(surface_manager),
       frame_sink_id_(frame_sink_id),
+      display_begin_frame_source_(std::move(display_begin_frame_source)),
       display_(std::move(display)),
       surface_factory_(frame_sink_id_, surface_manager_, this),
       weak_factory_(this) {
   surface_manager_->RegisterFrameSinkId(frame_sink_id_);
   surface_manager_->RegisterSurfaceFactoryClient(frame_sink_id_, this);
 
   if (display_) {
     display_->Initialize(this, surface_manager_);
     display_->SetVisible(true);
   }
@@ skipping 157 matching lines @@
     return;
 
   added_frame_observer_ = needs_begin_frame_;
   if (needs_begin_frame_)
     begin_frame_source_->AddObserver(this);
   else
     begin_frame_source_->RemoveObserver(this);
 }
 
 }  // namespace cc