Fix a bunch of IWYU violators that don't include scoped_ptr.h

components/sync_driver/local_device_info_provider.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 COMPONENTS_SYNC_DRIVER_LOCAL_DEVICE_INFO_PROVIDER_H_
 #define COMPONENTS_SYNC_DRIVER_LOCAL_DEVICE_INFO_PROVIDER_H_
 
 #include <string>
+
 #include "base/callback_list.h"
+#include "base/memory/scoped_ptr.h"
 
 namespace base {
 class TaskRunner;
 }
 
 namespace sync_driver {
 
 class DeviceInfo;
 
 // Interface for providing sync specific information about the
@@ skipping 31 matching lines @@
   // The callback will remain registered until the
   // returned Subscription is destroyed, which must occur before the
   // CallbackList is destroyed.
   virtual scoped_ptr<Subscription> RegisterOnInitializedCallback(
       const base::Closure& callback) = 0;
 };
 
 }  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_LOCAL_DEVICE_INFO_PROVIDER_H_