Revert of Remove header dependencies from sequence_checker.h to sequenced_worker_pool.h

components/safe_browsing_db/v4_local_database_manager.cc

 // Copyright 2016 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.
 
 // This file should not be build on Android but is currently getting built.
 // TODO(vakh): Fix that: http://crbug.com/621647
 
 #include "components/safe_browsing_db/v4_local_database_manager.h"
 
 #include <vector>
 
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/metrics/histogram_macros.h"
-#include "base/threading/sequenced_worker_pool.h"
 #include "components/safe_browsing_db/v4_feature_list.h"
 #include "components/safe_browsing_db/v4_protocol_manager_util.h"
 #include "content/public/browser/browser_thread.h"
 #include "crypto/sha2.h"
 
 using content::BrowserThread;
 using base::TimeTicks;
 
 namespace safe_browsing {
 
@@ skipping 711 matching lines @@
                             db_updated_callback_);
 }
 
 bool V4LocalDatabaseManager::AreStoresAvailableNow(
     const StoresToCheck& stores_to_check) const {
   return enabled_ && v4_database_ &&
          v4_database_->AreStoresAvailable(stores_to_check);
 }
 
 }  // namespace safe_browsing