[vr] Deny permission requests in VR mode

chrome/browser/permissions/permission_request_manager.h

Index: chrome/browser/permissions/permission_request_manager.h
diff --git a/chrome/browser/permissions/permission_request_manager.h b/chrome/browser/permissions/permission_request_manager.h
index f768823bae8a45afc9134fe5335e9904973cffa8..4b2583bd51050ee79b113ad9e46085d4310662c6 100644
--- a/chrome/browser/permissions/permission_request_manager.h
+++ b/chrome/browser/permissions/permission_request_manager.h
@@ -110,6 +110,8 @@ class PermissionRequestManager
     auto_response_for_test_ = response;
   }
 
+  virtual bool PermissionRequestsDisabled() const;
+
  private:
   friend class test::PermissionRequestManagerTestApi;