Skip ARC initial screen when everything is set up by policy

chrome/browser/chromeos/arc/optin/arc_optin_preference_handler_observer.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_CHROMEOS_ARC_OPTIN_ARC_OPTIN_PREFERENCE_HANDLER_OBSERVER_H_
 #define CHROME_BROWSER_CHROMEOS_ARC_OPTIN_ARC_OPTIN_PREFERENCE_HANDLER_OBSERVER_H_
 
 namespace arc {
 
 // Notifies about changes in ARC related preferences and metrics mode.
 class ArcOptInPreferenceHandlerObserver {
  public:
-  // Notifies metrics mode has been changed.
+  // Notifies that the metrics mode has been changed.
   virtual void OnMetricsModeChanged(bool enabled, bool managed) = 0;
-  // Notifies use backup and restore preference has been changed.
+  // Notifies that the backup and restore mode has been changed.
   virtual void OnBackupAndRestoreModeChanged(bool enabled, bool managed) = 0;
-  // Notifies location service consent preference has been changed.
+  // Notifies that the location service mode has been changed.
   virtual void OnLocationServicesModeChanged(bool enabled, bool managed) = 0;
 
   virtual ~ArcOptInPreferenceHandlerObserver() = default;
 };
 
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_OPTIN_ARC_OPTIN_PREFERENCE_HANDLER_OBSERVER_H_