[vr] Deny permission requests in VR mode

chrome/browser/android/vr_shell/vr_tab_helper.h

-// Copyright 2017 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_TAB_HELPER_H_
-#define CHROME_BROWSER_ANDROID_VR_SHELL_VR_TAB_HELPER_H_
-
-#include "base/macros.h"
-#include "content/public/browser/web_contents_user_data.h"
-
-namespace vr_shell {
-
-class VrTabHelper : public content::WebContentsUserData<VrTabHelper> {
- public:
-  ~VrTabHelper() override;
-
-  bool is_in_vr() const { return is_in_vr_; }
-
-  // Called by VrShell when we enter and exit vr mode. It finds us by looking us
-  // up on the WebContents.
-  void SetIsInVr(bool is_in_vr);
-
-  static bool IsInVr(content::WebContents* contents);
-
- private:
-  explicit VrTabHelper(content::WebContents* contents);
-
-  friend class content::WebContentsUserData<VrTabHelper>;
-
-  content::WebContents* web_contents_;
-  bool is_in_vr_ = false;
-
-  DISALLOW_COPY_AND_ASSIGN(VrTabHelper);
-};
-
-}  // namespace vr_shell
-
-#endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_TAB_HELPER_H_