Use callback_forward.h instead of callback.h where possible.

chrome/browser/password_manager/password_store_mac.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_MAC_H_
 #define CHROME_BROWSER_PASSWORD_MANAGER_PASSWORD_STORE_MAC_H_
 #pragma once
 
 #include <vector>
 
-#include "base/callback.h"
+#include "base/callback_forward.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread.h"
 #include "chrome/browser/password_manager/login_database.h"
 #include "chrome/browser/password_manager/password_store.h"
 
 class MacKeychain;
 
 namespace content {
 class NotificationService;
 }
@@ skipping 69 matching lines @@
   scoped_ptr<base::Thread> thread_;
 
   // Since we aren't running on a well-known thread but still want to send out
   // notifications, we need to run our own service.
   scoped_ptr<content::NotificationService> notification_service_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordStoreMac);
 };
 
 #endif  // CHROME_BROWSER_PASSWORD_MANAGER_PASSWORD_STORE_MAC_H_