chrome: Cleanup class/struct forward declarations

chrome/browser/chromeos/policy/browser_policy_connector_chromeos.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_POLICY_BROWSER_POLICY_CONNECTOR_CHROMEOS_H_
 #define CHROME_BROWSER_CHROMEOS_POLICY_BROWSER_POLICY_CONNECTOR_CHROMEOS_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 24 matching lines @@
 
 namespace policy {
 
 class AffiliatedCloudPolicyInvalidator;
 class AffiliatedInvalidationServiceProvider;
 class AffiliatedRemoteCommandsInvalidator;
 class BluetoothPolicyHandler;
 class DeviceActiveDirectoryPolicyManager;
 class DeviceCloudPolicyInitializer;
 class DeviceLocalAccountPolicyService;
-class DeviceManagementService;
 struct EnrollmentConfig;
 class NetworkConfigurationUpdater;
 class ProxyPolicyProvider;
 class ServerBackedStateKeysBroker;
 
 // Extends ChromeBrowserPolicyConnector with the setup specific to Chrome OS.
 class BrowserPolicyConnectorChromeOS
     : public ChromeBrowserPolicyConnector,
       public DeviceCloudPolicyManagerChromeOS::Observer {
  public:
@@ skipping 151 matching lines @@
   std::unique_ptr<NetworkConfigurationUpdater> network_configuration_updater_;
 
   base::WeakPtrFactory<BrowserPolicyConnectorChromeOS> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPolicyConnectorChromeOS);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_CHROMEOS_POLICY_BROWSER_POLICY_CONNECTOR_CHROMEOS_H_