[sync] skeleton implementation of TypedURLSyncBridge

components/history/core/browser/history_service.cc

Index: components/history/core/browser/history_service.cc
diff --git a/components/history/core/browser/history_service.cc b/components/history/core/browser/history_service.cc
index b154b3237e19b1373d1c0ba522aefc8229a51861..f930b25329ec23fb7761f45660862b7d5e6aef48 100644
--- a/components/history/core/browser/history_service.cc
+++ b/components/history/core/browser/history_service.cc
@@ -234,6 +234,10 @@ URLDatabase* HistoryService::InMemoryDatabase() {
   return in_memory_backend_ ? in_memory_backend_->db() : nullptr;
 }
 
+TypedURLSyncBridge* HistoryService::GetTypedURLSyncBridge() const {
+  return history_backend_->GetTypedURLSyncBridge();
+}
+
 TypedUrlSyncableService* HistoryService::GetTypedUrlSyncableService() const {
   return history_backend_->GetTypedUrlSyncableService();
 }