chrome: Cleanup class/struct forward declarations

chrome/browser/chromeos/login/quick_unlock/quick_unlock_notification_controller.h

 // Copyright (c) 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_LOGIN_QUICK_UNLOCK_QUICK_UNLOCK_NOTIFICATION_CONTROLLER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_QUICK_UNLOCK_QUICK_UNLOCK_NOTIFICATION_CONTROLLER_H_
 
 #include "base/macros.h"
 #include "base/time/time.h"
 #include "chrome/browser/notifications/notification_delegate.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 class Profile;
-class NetworkState;
 class Notification;
 
 namespace chromeos {
 
 // Quick Unlock feature notification controller is responsible for managing the
 // new feature notification displayed to the user.
 class QuickUnlockNotificationController : public NotificationDelegate,
                                           public content::NotificationObserver {
  public:
   explicit QuickUnlockNotificationController(Profile* profile);
@@ skipping 20 matching lines @@
 
   Profile* profile_;
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(QuickUnlockNotificationController);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_QUICK_UNLOCK_QUICK_UNLOCK_NOTIFICATION_CONTROLLER_H_