[Sync] Add ProfileSyncService::GetModelTypeStoreFactory.

chrome/browser/sync/profile_sync_service_factory.cc

Index: chrome/browser/sync/profile_sync_service_factory.cc
diff --git a/chrome/browser/sync/profile_sync_service_factory.cc b/chrome/browser/sync/profile_sync_service_factory.cc
index f9c8481e4056ee92b52757fc56c241edb558006e..10671f8402360cf509929c46d4a51b7c877da291 100644
--- a/chrome/browser/sync/profile_sync_service_factory.cc
+++ b/chrome/browser/sync/profile_sync_service_factory.cc
@@ -152,7 +152,12 @@ KeyedService* ProfileSyncServiceFactory::BuildServiceInstanceFor(
   init_params.url_request_context = profile->GetRequestContext();
   init_params.debug_identifier = profile->GetDebugName();
   init_params.channel = chrome::GetChannel();
-  init_params.blocking_pool = content::BrowserThread::GetBlockingPool();
+  base::SequencedWorkerPool* blocking_pool =
+      content::BrowserThread::GetBlockingPool();
+  init_params.blocking_task_runner =
+      blocking_pool->GetSequencedTaskRunnerWithShutdownBehavior(
+          blocking_pool->GetSequenceToken(),
+          base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
 
   bool local_sync_backend_enabled = false;