Revert of mojo VR interface simplified

device/vr/vr_client_dispatcher.h

+// Copyright 2016 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.
+
+#ifndef DEVICE_VR_VR_CLIENT_DISPATCHER_H
+#define DEVICE_VR_VR_CLIENT_DISPATCHER_H
+
+#include "device/vr/vr_service.mojom.h"
+
+namespace device {
+
+class VRDevice;
+
+class VRClientDispatcher {
+ public:
+  virtual void OnDeviceChanged(VRDisplayPtr device) = 0;
+  virtual void OnDeviceConnectionStatusChanged(VRDevice* device,
+                                               bool is_connected) = 0;
+  virtual void OnPresentEnded(VRDevice* device) = 0;
+};
+
+}  // namespace device
+
+#endif  // DEVICE_VR_VR_CLIENT_DISPATCHER_H