Disable permissions dialog in VR

chrome/browser/android/vr_shell/vr_tab_helper.cc

 // 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.
 
 #include "chrome/browser/android/vr_shell/vr_tab_helper.h"
 
 #include "chrome/browser/android/vr_shell/vr_shell_delegate.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/common/web_preferences.h"
 #include "device/vr/android/gvr/gvr_delegate_provider.h"
@@ skipping 18 matching lines @@
 
   WebPreferences web_prefs =
       web_contents_->GetRenderViewHost()->GetWebkitPreferences();
   web_prefs.page_popups_suppressed = is_in_vr_;
   web_contents_->GetRenderViewHost()->UpdateWebkitPreferences(web_prefs);
 }
 
 /* static */
 bool VrTabHelper::IsInVr(content::WebContents* contents) {
   VrTabHelper* vr_tab_helper = VrTabHelper::FromWebContents(contents);
+  if (!vr_tab_helper) {
+    // This can only happen for unittests.
+    VrTabHelper::CreateForWebContents(contents);
+    vr_tab_helper = VrTabHelper::FromWebContents(contents);
+  }
   return vr_tab_helper->is_in_vr();
 }
 
 }  // namespace vr_shell