media: add ArcCamera3Service Mojo service

media/capture/video/chromeos/camera_hal_delegate.h

Index: media/capture/video/chromeos/camera_hal_delegate.h
diff --git a/media/capture/video/chromeos/camera_hal_delegate.h b/media/capture/video/chromeos/camera_hal_delegate.h
index 7089c4eceb630cb0547276e96209f8077165194b..7c67f67ac03f1d0e1f73cd5b44a744dc8e677b5c 100644
--- a/media/capture/video/chromeos/camera_hal_delegate.h
+++ b/media/capture/video/chromeos/camera_hal_delegate.h
@@ -8,6 +8,7 @@
 #include "base/macros.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
+#include "media/capture/video/chromeos/arc_camera3_service.h"
 #include "media/capture/video/chromeos/mojo/arc_camera3.mojom.h"
 #include "media/capture/video/video_capture_device_factory.h"
 #include "media/capture/video_capture_types.h"
@@ -25,10 +26,11 @@ class CAPTURE_EXPORT CameraHalDelegate final
   explicit CameraHalDelegate(
       const scoped_refptr<base::SingleThreadTaskRunner> module_task_runner);
 
+  // TODO(jcliang): Update docstring.
   // Establishes the Mojo IPC channel to the camera HAL adapter.  This method
   // should be called before any other methods of CameraHalDelegate is called.
   // Called by VideoCaptureDeviceFactoryChromeOS::Init on the browser IO thread.
-  bool StartCameraModuleIpc();
+  void Start();
 
   // Delegation methods for the VideoCaptureDeviceFactory interface.  These
   // methods are called by VideoCaptureDeviceFactoryChromeOS directly.  They
@@ -60,6 +62,25 @@ class CAPTURE_EXPORT CameraHalDelegate final
 
   ~CameraHalDelegate();
 
+  class LocalCameraClient : public ArcCamera3Service::CameraClientObserver {
+   public:
+    LocalCameraClient(scoped_refptr<CameraHalDelegate> camera_hal_delegate);
+
+    void NotifyCameraHalRegistered(arc::mojom::CameraModulePtr camera_module);
+
+   private:
+    scoped_refptr<CameraHalDelegate> camera_hal_delegate_;
+    DISALLOW_IMPLICIT_CONSTRUCTORS(LocalCameraClient);
+  };
+
+  void SetCameraModule(arc::mojom::CameraModulePtrInfo camera_module_ptr_info);
+  base::WaitableEvent camera_module_set_;
+
+  // Mojo connection error handler.  On Mojo connection error, the handler will
+  // try to re-establish the Mojo connection to the camera HAL.
+  void SetConnectionErrorHandlerOnModuleThread();
+  void HandleMojoConnectionErrorOnModuleThread();
+
   // Resets the Mojo interface and bindings.
   void ResetMojoInterfaceOnModuleThread(base::WaitableEvent* interface_closed);