[Sync] Maintain a global_id mapping to update UserEvents that references navigations

ios/chrome/browser/sync/ios_user_event_service_factory.cc

Index: ios/chrome/browser/sync/ios_user_event_service_factory.cc
diff --git a/ios/chrome/browser/sync/ios_user_event_service_factory.cc b/ios/chrome/browser/sync/ios_user_event_service_factory.cc
index dcca1a85fd9193e850ab6be302988cfefd5ae667..f3b98bc125d7a911cbc1fab7b13f71cafdf69d0c 100644
--- a/ios/chrome/browser/sync/ios_user_event_service_factory.cc
+++ b/ios/chrome/browser/sync/ios_user_event_service_factory.cc
@@ -55,12 +55,14 @@ IOSUserEventServiceFactory::BuildServiceInstanceFor(
       base::BindRepeating(&syncer::ModelTypeChangeProcessor::Create,
                           base::BindRepeating(&syncer::ReportUnrecoverableError,
                                               ::GetChannel()));
-  auto bridge = base::MakeUnique<syncer::UserEventSyncBridge>(
-      std::move(store_factory), std::move(processor_factory));
-  return base::MakeUnique<syncer::UserEventServiceImpl>(
+  syncer::SyncService* sync_service =
       IOSChromeProfileSyncServiceFactory::GetForBrowserState(
-          ios::ChromeBrowserState::FromBrowserState(browser_state)),
-      std::move(bridge));
+          ios::ChromeBrowserState::FromBrowserState(browser_state));
+  auto bridge = base::MakeUnique<syncer::UserEventSyncBridge>(
+      std::move(store_factory), std::move(processor_factory),
+      sync_service->GetGlobalIdMapper());
+  return base::MakeUnique<syncer::UserEventServiceImpl>(sync_service,
+                                                        std::move(bridge));
 }
 
 web::BrowserState* IOSUserEventServiceFactory::GetBrowserStateToUse(