Move ReferencedSurfaceTracker into GpuCompositorFrameSink.

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 23 matching lines @@
     cc::mojom::DisplayCompositorClientPtr client)
     : manager_(cc::SurfaceManager::LifetimeType::REFERENCES),
       reference_manager_(&manager_),
       gpu_service_(std::move(gpu_service)),
       gpu_memory_buffer_manager_(std::move(gpu_memory_buffer_manager)),
       image_factory_(image_factory),
       task_runner_(base::ThreadTaskRunnerHandle::Get()),
       client_(std::move(client)),
       binding_(this, std::move(request)) {
   manager_.AddObserver(this);
-  if (client_)
-    client_->OnDisplayCompositorCreated(GetRootSurfaceId());
 }
 
 void DisplayCompositor::AddSurfaceReferences(
     const std::vector<cc::SurfaceReference>& references) {
   DCHECK(thread_checker_.CalledOnValidThread());
   for (const auto& reference : references) {
     reference_manager_->AddSurfaceReference(reference.parent_id(),
                                             reference.child_id());
   }
 }
@@ skipping 139 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