chrome: Cleanup class/struct forward declarations

chrome/browser/supervised_user/child_accounts/child_account_service.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_SUPERVISED_USER_CHILD_ACCOUNTS_CHILD_ACCOUNT_SERVICE_H_
 #define CHROME_BROWSER_SUPERVISED_USER_CHILD_ACCOUNTS_CHILD_ACCOUNT_SERVICE_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/supervised_user/child_accounts/family_info_fetcher.h"
 #include "chrome/browser/supervised_user/supervised_user_service.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "components/signin/core/browser/account_tracker_service.h"
 #include "net/base/backoff_entry.h"
 
-namespace base {
-class FilePath;
-}
-
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 class Profile;
 
 // This class handles detection of child accounts (on sign-in as well as on
 // browser restart), and triggers the appropriate behavior (e.g. enable the
 // supervised user experience, fetch information about the parent(s)).
 class ChildAccountService : public KeyedService,
@@ skipping 62 matching lines @@
 
   // Callbacks to run when the user status becomes known.
   std::vector<base::Closure> status_received_callback_list_;
 
   base::WeakPtrFactory<ChildAccountService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildAccountService);
 };
 
 #endif  // CHROME_BROWSER_SUPERVISED_USER_CHILD_ACCOUNTS_CHILD_ACCOUNT_SERVICE_H_