Implement GpuArcVideoService for arc video accelerator

components/arc/arc_bridge_service.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 "components/arc/arc_bridge_service.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/sequenced_task_runner.h"
@@ skipping 59 matching lines @@
 void ArcBridgeService::AddAppObserver(AppObserver* observer) {
   DCHECK(CalledOnValidThread());
   app_observer_list_.AddObserver(observer);
 }
 
 void ArcBridgeService::RemoveAppObserver(AppObserver* observer) {
   DCHECK(CalledOnValidThread());
   app_observer_list_.RemoveObserver(observer);
 }
 
+void ArcBridgeService::AddVideoServiceObserver(VideoServiceObserver* observer) {
+  DCHECK(CalledOnValidThread());
+  video_service_observer_list_.AddObserver(observer);
+}
+
+void ArcBridgeService::RemoveVideoServiceObserver(
+    VideoServiceObserver* observer) {
+  DCHECK(CalledOnValidThread());
+  video_service_observer_list_.RemoveObserver(observer);
+}
+
 void ArcBridgeService::SetState(State state) {
   DCHECK(CalledOnValidThread());
   // DCHECK on enum classes not supported.
   DCHECK(state_ != state);
   state_ = state;
   FOR_EACH_OBSERVER(Observer, observer_list(), OnStateChanged(state_));
 }
 
 void ArcBridgeService::SetAvailable(bool available) {
   DCHECK(CalledOnValidThread());
   DCHECK(available_ != available);
   available_ = available;
   FOR_EACH_OBSERVER(Observer, observer_list(), OnAvailableChanged(available_));
 }
 
 bool ArcBridgeService::CalledOnValidThread() {
   return thread_checker_.CalledOnValidThread();
 }
 
 }  // namespace arc