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

chrome/browser/extensions/api/storage/managed_value_store_cache.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/extensions/api/storage/managed_value_store_cache.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/scoped_observer.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/extensions/api/storage/policy_value_store.h"
 #include "chrome/browser/policy/profile_policy_connector.h"
 #include "chrome/browser/policy/profile_policy_connector_factory.h"
 #include "chrome/browser/policy/schema_registry_service.h"
 #include "chrome/browser/policy/schema_registry_service_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/api/storage/storage_schema_manifest_handler.h"
 #include "components/policy/core/common/schema.h"
 #include "components/policy/core/common/schema_map.h"
 #include "components/policy/core/common/schema_registry.h"
@@ skipping 354 matching lines @@
   return raw_store;
 }
 
 bool ManagedValueStoreCache::HasStore(const std::string& extension_id) const {
   // Note: Currently only manage extensions (not apps).
   return storage_factory_->HasSettings(settings_namespace::MANAGED,
                                        kManagedModelType, extension_id);
 }
 
 }  // namespace extensions