Implement GpuArcVideoService for arc video accelerator

components/arc/arc_bridge_service.h

Index: components/arc/arc_bridge_service.h
diff --git a/components/arc/arc_bridge_service.h b/components/arc/arc_bridge_service.h
index 98902e60e0424b5c197c93c8d4709f9a7217976f..cb5a3522f53a1fdb6c69436a8954ae100e8edece 100644
--- a/components/arc/arc_bridge_service.h
+++ b/components/arc/arc_bridge_service.h
@@ -19,6 +19,10 @@ namespace base {
 class CommandLine;
 }  // namespace base
 
+namespace IPC {
+class ChannelHandle;
+}  // namespace IPC
+
 namespace arc {
 
 class ArcBridgeBootstrap;
@@ -128,6 +132,16 @@ class ArcBridgeService {
     virtual ~ProcessObserver() {}
   };
 
+  // Notifies ARC video service events.
+  class VideoService {
+   public:
+    // Called whenever to create video accelerator connection.
+    virtual void OnRequestArcVideoAcceleratorChannel() {}
+
+   protected:
+    virtual ~VideoService() {}
+  };
+
   virtual ~ArcBridgeService();
 
   // Gets the global instance of the ARC Bridge Service. This can only be
@@ -169,6 +183,10 @@ class ArcBridgeService {
   void AddProcessObserver(ProcessObserver* observer);
   void RemoveProcessObserver(ProcessObserver* observer);
 
+  // Set VideoService provider. This can only be called on the thread that
+  // this class was created on.
+  void SetVideoService(VideoService* service);
+
   // Gets the current state of the bridge service.
   State state() const { return state_; }
 
@@ -205,6 +223,10 @@ class ArcBridgeService {
   // When the result comes back, Observer::OnUpdateProcessList() is called.
   virtual bool RequestProcessList() = 0;
 
+  // Notify the ipc handle for video accelerator is created.
+  virtual void NotifyVideoAcceleratorChannelCreated(
+      const IPC::ChannelHandle& handle) = 0;
+
  protected:
   ArcBridgeService();
 
@@ -228,6 +250,8 @@ class ArcBridgeService {
     return process_observer_list_;
   }
 
+  VideoService* video_service() { return video_service_; }
+
   bool CalledOnValidThread();
 
  private:
@@ -241,6 +265,8 @@ class ArcBridgeService {
   base::ObserverList<AppObserver> app_observer_list_;
   base::ObserverList<ProcessObserver> process_observer_list_;
 
+  VideoService* video_service_;
+
   base::ThreadChecker thread_checker_;
 
   // If the ARC instance service is available.