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

chrome/browser/memory_details_mac.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/memory_details.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <set>
 #include <string>
 
 #include "base/bind.h"
 #include "base/file_version_info.h"
 #include "base/files/file_path.h"
 #include "base/mac/foundation_util.h"
 #include "base/process/process_iterator.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/thread.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/chromium_strings.h"
 #include "components/version_info/version_info.h"
 #include "content/public/browser/browser_child_process_host.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/common/process_type.h"
 #include "ui/base/l10n/l10n_util.h"
 
@@ skipping 93 matching lines @@
 
   // Collect data about Chrome/Chromium.
   for (const base::ProcessId& pid : all_pids)
     CollectProcessDataForChromeProcess(child_info, pid, chrome_processes);
 
   // Finally return to the browser thread.
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&MemoryDetails::CollectChildInfoOnUIThread, this));
 }