[Sync] Create UserEventService.

chrome/browser/profiles/chrome_browser_main_extra_parts_profiles.cc

Index: chrome/browser/profiles/chrome_browser_main_extra_parts_profiles.cc
diff --git a/chrome/browser/profiles/chrome_browser_main_extra_parts_profiles.cc b/chrome/browser/profiles/chrome_browser_main_extra_parts_profiles.cc
index 33201052f33cb3205a8043c856e058d0a42e6df4..3323ef25521235482b07a2822edabd8371b2644a 100644
--- a/chrome/browser/profiles/chrome_browser_main_extra_parts_profiles.cc
+++ b/chrome/browser/profiles/chrome_browser_main_extra_parts_profiles.cc
@@ -62,6 +62,7 @@
 #include "chrome/browser/signin/account_tracker_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
+#include "chrome/browser/sync/user_event_service_factory.h"
 #include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/browser/thumbnails/thumbnail_service_factory.h"
 #include "chrome/browser/ui/app_list/app_list_syncable_service_factory.h"
@@ -195,6 +196,7 @@ EnsureBrowserContextKeyedServiceFactoriesBuilt() {
 #endif
   BookmarkModelFactory::GetInstance();
   BookmarkUndoServiceFactory::GetInstance();
+  browser_sync::UserEventServiceFactory::GetInstance();
 #if BUILDFLAG(ENABLE_CAPTIVE_PORTAL_DETECTION)
   CaptivePortalServiceFactory::GetInstance();
 #endif