Set up switches for user language detection and translation events.

components/sync/driver/sync_driver_switches.cc

Index: components/sync/driver/sync_driver_switches.cc
diff --git a/components/sync/driver/sync_driver_switches.cc b/components/sync/driver/sync_driver_switches.cc
index bb9f136c9c018f159ae4fd849c242e3beaf5a5e7..1b346e21c5b4ab1228035273a574b1c530a0ea83 100644
--- a/components/sync/driver/sync_driver_switches.cc
+++ b/components/sync/driver/sync_driver_switches.cc
@@ -40,6 +40,14 @@ const base::Feature kSyncClearDataOnPassphraseEncryption{
 const base::Feature kSyncUserEvents{"SyncUserEvents",
                                     base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Gates registration for user language detection events.
+const base::Feature kSyncUserLanguageDetectionEvents{
+    "SyncUserLanguageDetectionEvents", base::FEATURE_DISABLED_BY_DEFAULT};
+
+// Gates registration for user translation events.
+const base::Feature kSyncUserTranslationEvents{
+    "SyncUserTranslationEvents", base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Enables USS implementation of Autocomplete datatype.
 const base::Feature kSyncUSSAutocomplete{"SyncUSSAutocomplete",
                                          base::FEATURE_DISABLED_BY_DEFAULT};