Add missing #include around sequenced_worker_pool.h in //chrome

chrome/browser/net/url_request_mock_util.cc

 // Copyright (c) 2012 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 "chrome/browser/net/url_request_mock_util.h"
 
 #include <string>
 
 #include "base/path_service.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/thread_restrictions.h"
 #include "chrome/common/chrome_paths.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/test/url_request/url_request_failed_job.h"
 #include "net/test/url_request/url_request_mock_http_job.h"
 #include "net/test/url_request/url_request_slow_download_job.h"
 #include "net/url_request/url_request_filter.h"
 
 using content::BrowserThread;
 
@@ skipping 19 matching lines @@
     PathService::Get(chrome::DIR_TEST_DATA, &root_http);
     net::URLRequestMockHTTPJob::AddUrlHandlers(
         root_http, BrowserThread::GetBlockingPool());
   } else {
     // Revert to the default handlers.
     net::URLRequestFilter::GetInstance()->ClearHandlers();
   }
 }
 
 }  // namespace chrome_browser_net