Reland of mojo VR interface simpified.

device/vr/android/gvr/gvr_device_provider.h

Index: device/vr/android/gvr/gvr_device_provider.h
diff --git a/device/vr/android/gvr/gvr_device_provider.h b/device/vr/android/gvr/gvr_device_provider.h
index 23f8cb0832ebf83444db07b1a4d77cf6beffd24d..02f77583ffe40b6b46863e8073ab45194a29c8a0 100644
--- a/device/vr/android/gvr/gvr_device_provider.h
+++ b/device/vr/android/gvr/gvr_device_provider.h
@@ -9,7 +9,6 @@
 
 #include "base/macros.h"
 #include "base/single_thread_task_runner.h"
-#include "device/vr/vr_client_dispatcher.h"
 #include "device/vr/vr_device.h"
 #include "device/vr/vr_device_provider.h"
 #include "device/vr/vr_export.h"
@@ -18,6 +17,7 @@ namespace device {
 
 class GvrDelegate;
 class GvrDevice;
+class VRServiceImpl;
 
 class DEVICE_VR_EXPORT GvrDeviceProvider : public VRDeviceProvider {
  public:
@@ -35,13 +35,10 @@ class DEVICE_VR_EXPORT GvrDeviceProvider : public VRDeviceProvider {
   void OnGvrDelegateReady(GvrDelegate* delegate);
   void OnGvrDelegateRemoved();
 
-  void SetClient(VRClientDispatcher* client) override;
-
  private:
   void GvrDelegateReady(GvrDelegate* delegate);
   void GvrDelegateRemoved();
 
-  std::unique_ptr<VRClientDispatcher> client_;
   std::unique_ptr<GvrDevice> vr_device_;
 
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;