[Sync] Simplify GetSessionName interface

chrome/browser/sync/glue/sync_backend_host.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 "build/build_config.h"
 
 #include "chrome/browser/sync/glue/sync_backend_host.h"
 
 #include <algorithm>
 #include <map>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/location.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/timer.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/token_service.h"
 #include "chrome/browser/sync/glue/bridged_sync_notifier.h"
 #include "chrome/browser/sync/glue/change_processor.h"
 #include "chrome/browser/sync/glue/chrome_encryptor.h"
 #include "chrome/browser/sync/glue/http_bridge.h"
 #include "chrome/browser/sync/glue/sync_backend_registrar.h"
@@ skipping 934 matching lines @@
   DCHECK(registrar_);
 
   sync_manager_.reset(new sync_api::SyncManager(name_));
   sync_manager_->AddObserver(this);
   success = sync_manager_->Init(
       sync_data_folder_path_,
       options.event_handler,
       options.service_url.host() + options.service_url.path(),
       options.service_url.EffectiveIntPort(),
       options.service_url.SchemeIsSecure(),
+      BrowserThread::GetBlockingPool(),
       options.make_http_bridge_factory_fn.Run(),
       options.registrar /* as ModelSafeWorkerRegistrar */,
       options.extensions_activity_monitor,
       options.registrar /* as SyncManager::ChangeDelegate */,
       MakeUserAgentForSyncApi(),
       options.credentials,
       new BridgedSyncNotifier(
           options.chrome_sync_notification_bridge,
           options.sync_notifier_factory->CreateSyncNotifier()),
       options.restored_key_for_bootstrapping,
@@ skipping 330 matching lines @@
       FROM_HERE,
       base::Bind(&SyncBackendHost::Core::DoRefreshNigori,
                  core_.get(), sync_thread_done_callback));
 }
 
 #undef SDVLOG
 
 #undef SLOG
 
 }  // namespace browser_sync