Add SurfaceManager option to use references exclusively.

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 "cc/output/in_process_context_provider.h"
 #include "cc/surfaces/surface.h"
 #include "gpu/command_buffer/client/shared_memory_limits.h"
 #include "gpu/ipc/gpu_in_process_thread_service.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 #include "services/ui/common/mus_gpu_memory_buffer_manager.h"
 #include "services/ui/surfaces/gpu_compositor_frame_sink.h"
 
 namespace ui {
 
 DisplayCompositor::DisplayCompositor(
     scoped_refptr<gpu::InProcessCommandBuffer::Service> gpu_service,
     std::unique_ptr<MusGpuMemoryBufferManager> gpu_memory_buffer_manager,
     gpu::ImageFactory* image_factory,
     cc::mojom::DisplayCompositorRequest request,
     cc::mojom::DisplayCompositorClientPtr client)
-    : gpu_service_(std::move(gpu_service)),
+    : manager_(true),

[vmpstr, 2016/12/01 21:04:02]

manager_(true /* use_references */)

[kylechar, 2016/12/01 22:49:58]

Changed to enum.

+      gpu_service_(std::move(gpu_service)),
       gpu_memory_buffer_manager_(std::move(gpu_memory_buffer_manager)),
       image_factory_(image_factory),
       client_(std::move(client)),
       reference_manager_(&manager_),
       binding_(this, std::move(request)) {
   manager_.AddObserver(this);
 }
 
 void DisplayCompositor::CreateCompositorFrameSink(
     const cc::FrameSinkId& frame_sink_id,
@@ skipping 131 matching lines @@
       surface_id.local_frame_id());
 
   if (client_)
     client_->OnSurfaceCreated(surface_id, frame_size, device_scale_factor);
 }
 
 void DisplayCompositor::OnSurfaceDamaged(const cc::SurfaceId& surface_id,
                                          bool* changed) {}
 
 }  // namespace ui