Automated IWYU fix for TaskRunner includes.

components/sync/model/attachments/attachment_service_proxy_for_test.cc

 // 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.
 
 #include "components/sync/model/attachments/attachment_service_proxy_for_test.h"
 
 #include <utility>
 
 #include "base/message_loop/message_loop.h"
+#include "base/sequenced_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/sync/model/attachments/attachment_service.h"
 
 namespace syncer {
 
 AttachmentServiceProxyForTest::OwningCore::OwningCore(
     std::unique_ptr<AttachmentService> wrapped,
     std::unique_ptr<base::WeakPtrFactory<AttachmentService>> weak_ptr_factory)
     : Core(weak_ptr_factory->GetWeakPtr()),
       wrapped_(std::move(wrapped)),
@@ skipping 34 matching lines @@
 }
 
 AttachmentServiceProxyForTest::~AttachmentServiceProxyForTest() {}
 
 AttachmentServiceProxyForTest::AttachmentServiceProxyForTest(
     const scoped_refptr<base::SequencedTaskRunner>& wrapped_task_runner,
     const scoped_refptr<Core>& core)
     : AttachmentServiceProxy(wrapped_task_runner, core) {}
 
 }  // namespace syncer