Plumbing through more WebVR presentation code

device/vr/android/gvr/gvr_api_manager.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_ANDROID_GVR_API_MANAGER_H
-#define DEVICE_VR_ANDROID_GVR_API_MANAGER_H
-
-#include "device/vr/vr_export.h"
-
-#include "third_party/gvr-android-sdk/src/ndk-beta/include/vr/gvr/capi/include/gvr.h"
-
-namespace device {
-
-class DEVICE_VR_EXPORT GvrApiManagerClient {
- public:
-  virtual void OnGvrApiInitialized(gvr::GvrApi* gvr_api) = 0;
-  virtual void OnGvrApiShutdown() = 0;
-};
-
-class DEVICE_VR_EXPORT GvrApiManager {
- public:
-  static GvrApiManager* GetInstance();
-
-  void AddClient(GvrApiManagerClient* client);
-  void RemoveClient(GvrApiManagerClient* client);
-
-  void Initialize(gvr_context* context);
-  void Shutdown();
-
-  gvr::GvrApi* gvr_api();
-
- private:
-  GvrApiManager();
-  ~GvrApiManager();
-
-  std::unique_ptr<gvr::GvrApi> gvr_api_;
-
-  using ClientList = std::vector<GvrApiManagerClient*>;
-  ClientList clients_;
-};
-
-}  // namespace device
-
-#endif  // DEVICE_VR_ANDROID_GVR_API_MANAGER_H