chrome: Cleanup class/struct forward declarations

chrome/browser/chromeos/policy/device_status_collector.h

 // Copyright (c) 2012 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_POLICY_DEVICE_STATUS_COLLECTOR_H_
 #define CHROME_BROWSER_CHROMEOS_POLICY_DEVICE_STATUS_COLLECTOR_H_
 
 #include <stdint.h>
 
 #include <deque>
@@ skipping 18 matching lines @@
 #include "components/prefs/pref_member.h"
 #include "ui/base/idle/idle.h"
 
 namespace chromeos {
 class CrosSettings;
 namespace system {
 class StatisticsProvider;
 }
 }
 
-namespace content {
-class NotificationDetails;
-class NotificationSource;
-}
-
 class PrefRegistrySimple;
 class PrefService;
 
 namespace policy {
 
 struct DeviceLocalAccount;
 class GetStatusState;
 
 // Collects and summarizes the status of an enterprised-managed ChromeOS device.
 class DeviceStatusCollector {
@@ skipping 236 matching lines @@
   base::ThreadChecker thread_checker_;
 
   base::WeakPtrFactory<DeviceStatusCollector> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceStatusCollector);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_CHROMEOS_POLICY_DEVICE_STATUS_COLLECTOR_H_