[Sync] Add ProfileSyncService::GetModelTypeStoreFactory.

ios/chrome/browser/sync/ios_chrome_profile_sync_test_util.cc

Index: ios/chrome/browser/sync/ios_chrome_profile_sync_test_util.cc
diff --git a/ios/chrome/browser/sync/ios_chrome_profile_sync_test_util.cc b/ios/chrome/browser/sync/ios_chrome_profile_sync_test_util.cc
index 9bc40fc45acb59bf90ea0044d0f77fe51bd42527..f83e9782cb91672b4f5f09018829e6d0813f763b 100644
--- a/ios/chrome/browser/sync/ios_chrome_profile_sync_test_util.cc
+++ b/ios/chrome/browser/sync/ios_chrome_profile_sync_test_util.cc
@@ -38,7 +38,11 @@ CreateProfileSyncServiceParamsForTest(
   init_params.url_request_context = browser_state->GetRequestContext();
   init_params.debug_identifier = browser_state->GetDebugName();
   init_params.channel = ::GetChannel();
-  init_params.blocking_pool = web::WebThread::GetBlockingPool();
+  base::SequencedWorkerPool* blocking_pool = web::WebThread::GetBlockingPool();
+  init_params.blocking_task_runner =
+      blocking_pool->GetSequencedTaskRunnerWithShutdownBehavior(
+          blocking_pool->GetSequenceToken(),
+          base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
 
   return init_params;
 }