[cros] user_manager component - move UserManagerBase and UserManager

chrome/browser/chromeos/login/users/avatar/user_image_sync_observer.h

 // Copyright 2014 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_USERS_AVATAR_USER_IMAGE_SYNC_OBSERVER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USERS_AVATAR_USER_IMAGE_SYNC_OBSERVER_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
-#include "chrome/browser/chromeos/login/users/user_manager.h"
 #include "chrome/browser/prefs/pref_service_syncable_observer.h"
 #include "content/public/browser/notification_observer.h"
 
 class PrefChangeRegistrar;
 class PrefServiceSyncable;
 class Profile;
-namespace chromeos {
-class User;
-}
+
 namespace content {
 class NotificationRegistrar;
 }
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
+namespace user_manager {
+class User;
+}
+
 namespace chromeos {
 
 // This class is responsible for keeping local user image synced with
 // image saved in syncable preference.
 class UserImageSyncObserver: public PrefServiceSyncableObserver,
                              public content::NotificationObserver {
  public:
   class Observer {
    public:
     // Called right after image info synced (i.e. |is_synced| became |true|).
@@ skipping 56 matching lines @@
   bool is_synced_;
   // Indicates if local user image changed during initialization.
   bool local_image_changed_;
   ObserverList<Observer> observer_list_;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USERS_AVATAR_USER_IMAGE_SYNC_OBSERVER_H_