chrome: Cleanup class/struct forward declarations

chrome/browser/chromeos/policy/device_local_account_policy_store.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_LOCAL_ACCOUNT_POLICY_STORE_H_
 #define CHROME_BROWSER_CHROMEOS_POLICY_DEVICE_LOCAL_ACCOUNT_POLICY_STORE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 13 matching lines @@
 namespace chromeos {
 class SessionManagerClient;
 }
 
 namespace enterprise_management {
 class PolicyFetchResponse;
 }
 
 namespace policy {
 
-class DeviceLocalAccountPolicyBroker;
-
 // CloudPolicyStore implementation for device-local account policy. Stores/loads
 // policy to/from session_manager.
 class DeviceLocalAccountPolicyStore : public UserCloudPolicyStoreBase {
  public:
   DeviceLocalAccountPolicyStore(
       const std::string& account_id,
       chromeos::SessionManagerClient* client,
       chromeos::DeviceSettingsService* device_settings_service,
       scoped_refptr<base::SequencedTaskRunner> background_task_runner);
   ~DeviceLocalAccountPolicyStore() override;
@@ skipping 47 matching lines @@
   scoped_refptr<base::SequencedTaskRunner> background_task_runner_;
 
   base::WeakPtrFactory<DeviceLocalAccountPolicyStore> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceLocalAccountPolicyStore);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_CHROMEOS_POLICY_DEVICE_LOCAL_ACCOUNT_POLICY_STORE_H_