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

chrome/browser/apps/drive/drive_service_bridge.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 "chrome/browser/apps/drive/drive_service_bridge.h"
 
 #include <string>
 #include <utility>
 
 #include "base/logging.h"
 #include "base/macros.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/drive/drive_notification_manager_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "components/drive/drive_app_registry.h"
 #include "components/drive/drive_notification_manager.h"
 #include "components/drive/drive_notification_observer.h"
 #include "components/drive/service/drive_api_service.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_manager.h"
@@ skipping 109 matching lines @@
 }
 
 // static
 void DriveServiceBridge::AppendDependsOnFactories(
     std::set<BrowserContextKeyedServiceFactory*>* factories) {
   DCHECK(factories);
   factories->insert(ProfileOAuth2TokenServiceFactory::GetInstance());
   factories->insert(SigninManagerFactory::GetInstance());
   factories->insert(drive::DriveNotificationManagerFactory::GetInstance());
 }