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 e3417bc985756c0db52044b339df84c9da3d350b..e8f91571fd93a4fe91de42a1ae29d937537d489d 100644
--- a/components/arc/arc_bridge_service.h
+++ b/components/arc/arc_bridge_service.h
@@ -67,6 +67,9 @@ class ArcBridgeService : public IPC::Listener {
     // Called whenever ARC's availability has changed for this system.
     virtual void OnAvailableChanged(bool available) {}
 
+    // Called whenever to create video accelerator connection.
+    virtual void OnCreateArcVideoAcceleratorConnection() {}

[Owen Lin, 2015/12/07 09:05:23]

How about rename it as OnRequestArcVideoAcceleratorConnection()?
// Called whenever there is a request to create a video accelerator connection.

In addition, Should we use the observer pattern to support the function?
Observer sounds like an optional. But it is not the case.

How about a ConnectionProvider or ConnectionFactory?

For example:

class ArcBridgeService {
public:
  class ConnectionProvider {
    IPC::ChannelHandle buildConnection();
  };

  bool requestConnection(enum ConnectionType, IPC::ChannelHandle &output) {
  }

  void registerConnectionProvider(ConnectionType, ConnectionProvider) {
  }
};

[kcwu, 2015/12/10 10:17:37]

Revised to use new ArcBridgeService's new observer. PTAL.

+
    protected:
     virtual ~Observer() {}
   };
@@ -115,6 +118,8 @@ class ArcBridgeService : public IPC::Listener {
                            const std::string& device_type,
                            base::ScopedFD fd);
 
+  bool NotifyVideoAcceleratorConnectionCreated(IPC::ChannelHandle handle);
+
  private:
   friend class ArcBridgeTest;
   FRIEND_TEST_ALL_PREFIXES(ArcBridgeTest, Basic);
@@ -148,6 +153,8 @@ class ArcBridgeService : public IPC::Listener {
   // interaction.
   void OnInstanceReady();
 
+  void OnCreateArcVideoAcceleratorConnection();
+
   // Changes the current state and notifies all observers.
   void SetState(State state);