iwyu: Use callback_old.h where appropriate, part 2.

chrome/browser/password_manager/password_store.h

 // Copyright (c) 2011 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_PASSWORD_MANAGER_PASSWORD_STORE_H_
 #define CHROME_BROWSER_PASSWORD_MANAGER_PASSWORD_STORE_H_
 #pragma once
 
 #include <vector>
 
-#include "base/callback.h"
+#include "base/callback_old.h"
 #include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
 #include "base/threading/thread.h"
 #include "base/time.h"
 #include "content/browser/cancelable_request.h"
 
 class PasswordStoreConsumer;
 class Task;
 
 namespace browser_sync {
@@ skipping 169 matching lines @@
   // may have been changed.
   void NotifyLoginsChanged();
 
   // The observers.
   ObserverList<Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordStore);
 };
 
 #endif  // CHROME_BROWSER_PASSWORD_MANAGER_PASSWORD_STORE_H_