Switch WebVR to handle GvrApi management through VrShellDelegate

device/vr/android/gvr/gvr_delegate.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_DELEGATE_H
 #define DEVICE_VR_ANDROID_GVR_DELEGATE_H
 
+#include "device/vr/android/gvr/gvr_device_provider.h"
 #include "device/vr/vr_export.h"
 
-#include "third_party/gvr-android-sdk/src/ndk-beta/include/vr/gvr/capi/include/gvr.h"
-
-namespace base {
-template <typename Type>
-struct DefaultSingletonTraits;
-}  // namespace base
+namespace gvr {
+class GvrApi;
+}  // namespace gvr
 
 namespace device {
 
+class DEVICE_VR_EXPORT GvrDelegateProvider {
+ public:
+  static void SetInstance(GvrDelegateProvider* delegate_provider);
+  static GvrDelegateProvider* GetInstance();
+
+  virtual bool RequestWebVRPresent(GvrDeviceProvider* device_provider) = 0;
+  virtual void ExitWebVRPresent() = 0;
+
+ private:
+  static GvrDelegateProvider* delegate_provider_;
+};
+
 class DEVICE_VR_EXPORT GvrDelegate {
  public:
-  virtual void RequestWebVRPresent() = 0;
-  virtual void ExitWebVRPresent() = 0;
-
   virtual void SubmitWebVRFrame() = 0;
   virtual void UpdateWebVRTextureBounds(int eye,
                                         float left,
                                         float top,
                                         float width,
                                         float height) = 0;
 
   virtual gvr::GvrApi* gvr_api() = 0;
 };
 
-class DEVICE_VR_EXPORT GvrDelegateClient {
- public:
-  virtual void OnDelegateInitialized(GvrDelegate* delegate) = 0;
-  virtual void OnDelegateShutdown() = 0;
-};
-
-class DEVICE_VR_EXPORT GvrDelegateManager {
- public:
-  static GvrDelegateManager* GetInstance();
-
-  void AddClient(GvrDelegateClient* client);
-  void RemoveClient(GvrDelegateClient* client);
-
-  void Initialize(GvrDelegate* delegate);
-  void Shutdown();
-
-  GvrDelegate* delegate() { return delegate_; }
-
- private:
-  friend struct base::DefaultSingletonTraits<GvrDelegateManager>;
-
-  GvrDelegateManager();
-  ~GvrDelegateManager();
-
-  GvrDelegate* delegate_;
-
-  using ClientList = std::vector<GvrDelegateClient*>;
-  ClientList clients_;
-};
-
 }  // namespace device
 
 #endif  // DEVICE_VR_ANDROID_GVR_DELEGATE_H