Switch WebVR to handle GvrApi management through VrShellDelegate

chrome/browser/android/vr_shell/vr_shell_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 CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_DELEGATE_H_
+#define CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_DELEGATE_H_
+
+#include <jni.h>
+
+#include "base/android/jni_weak_ref.h"
+#include "device/vr/android/gvr/gvr_delegate.h"
+
+namespace vr_shell {
+
+class VrShell;
+
+class VrShellDelegate : public device::GvrDelegateProvider {
+ public:
+  VrShellDelegate(JNIEnv* env, jobject obj);
+  virtual ~VrShellDelegate();
+
+  // Called by the Java VrShellDelegate
+  bool ExitVRIfNecessary(JNIEnv* env, jobject obj);
+
+  // device::vrDelegateProvider implementation
+  bool RequestWebVRPresent(device::GvrDeviceProvider* device_provider) override;
+  void ExitWebVRPresent() override;
+
+  // Called from VRShell
+  void OnVrShellReady(VrShell* vr_shell);
+
+ private:
+  base::android::ScopedJavaGlobalRef<jobject> j_vr_shell_delegate_;
+  device::GvrDeviceProvider* device_provider_;
+};
+
+bool RegisterVrShellDelegate(JNIEnv* env);
+
+}  // namespace vr_shell
+
+#endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_DELEGATE_H_