[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 52701c5a8a705c4ed2e8a848daa31ace8a602588..f4c9e77d0429f83e8a8f79b442d3b7c4d72e9bda 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();
 }