Migrate WebVR Cardboard implementation to GVR

device/vr/android/cardboard/cardboard_vr_device_provider.h

-// Copyright 2015 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_CARDBOARD_VR_DEVICE_PROVIDER_H
-#define DEVICE_VR_CARDBOARD_VR_DEVICE_PROVIDER_H
-
-#include <map>
-#include <memory>
-
-#include "base/macros.h"
-#include "device/vr/vr_device.h"
-#include "device/vr/vr_device_provider.h"
-
-namespace device {
-
-class CardboardVRDeviceProvider : public VRDeviceProvider {
- public:
-  CardboardVRDeviceProvider();
-  ~CardboardVRDeviceProvider() override;
-
-  void GetDevices(std::vector<VRDevice*>* devices) override;
-  void Initialize() override;
-
- private:
-  std::unique_ptr<VRDevice> cardboard_device_;
-
-  DISALLOW_COPY_AND_ASSIGN(CardboardVRDeviceProvider);
-};
-
-}  // namespace device
-
-#endif  // DEVICE_VR_CARDBOARD_VR_DEVICE_PROVIDER_H