Get ModelTypeStoreFactory for reading list from ProfileSyncService

ios/chrome/browser/reading_list/reading_list_model_factory.cc

Index: ios/chrome/browser/reading_list/reading_list_model_factory.cc
diff --git a/ios/chrome/browser/reading_list/reading_list_model_factory.cc b/ios/chrome/browser/reading_list/reading_list_model_factory.cc
index b6e2c0c82e63142d3cc462c111c7b7b528561512..e396d611e6c026f5e81d63dbaf8f9eb7fbfdb3f3 100644
--- a/ios/chrome/browser/reading_list/reading_list_model_factory.cc
+++ b/ios/chrome/browser/reading_list/reading_list_model_factory.cc
@@ -9,6 +9,7 @@
 #include "base/files/file_path.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
+#include "components/browser_sync/profile_sync_service.h"
 #include "components/keyed_service/ios/browser_state_dependency_manager.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/reading_list/core/reading_list_switches.h"
@@ -19,6 +20,7 @@
 #include "ios/chrome/browser/browser_state/browser_state_otr_helper.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/experimental_flags.h"
+#include "ios/chrome/browser/sync/ios_chrome_profile_sync_service_factory.h"
 #include "ios/chrome/common/channel_info.h"
 #include "ios/web/public/web_thread.h"
 
@@ -62,23 +64,18 @@ void ReadingListModelFactory::RegisterBrowserStatePrefs(
 
 std::unique_ptr<KeyedService> ReadingListModelFactory::BuildServiceInstanceFor(
     web::BrowserState* context) const {
-  scoped_refptr<base::SequencedTaskRunner> background_task_runner =
-      web::WebThread::GetBlockingPool()->GetSequencedTaskRunner(
-          web::WebThread::GetBlockingPool()->GetSequenceToken());
-
-  base::FilePath database_dir(
-      context->GetStatePath().Append(FILE_PATH_LITERAL("readinglist")));
+  ios::ChromeBrowserState* chrome_browser_state =
+      ios::ChromeBrowserState::FromBrowserState(context);
+  browser_sync::ProfileSyncService* profile_sync_service =
+      IOSChromeProfileSyncServiceFactory::GetForBrowserState(
+          chrome_browser_state);
 
-  // TODO(crbug.com/664920): use a shared location for the store.
   std::unique_ptr<ReadingListStore> store = base::MakeUnique<ReadingListStore>(
-      base::Bind(&syncer::ModelTypeStore::CreateStore, syncer::READING_LIST,
-                 database_dir.AsUTF8Unsafe(), background_task_runner),
+      profile_sync_service->GetModelTypeStoreFactory(syncer::READING_LIST),
       base::Bind(&syncer::ModelTypeChangeProcessor::Create,
                  base::BindRepeating(&syncer::ReportUnrecoverableError,
                                      GetChannel())));
 
-  ios::ChromeBrowserState* chrome_browser_state =
-      ios::ChromeBrowserState::FromBrowserState(context);
   std::unique_ptr<KeyedService> reading_list_model =
       base::MakeUnique<ReadingListModelImpl>(std::move(store),
                                              chrome_browser_state->GetPrefs());