UserEvent proto exploration for Translate use case.

components/sync/protocol/proto_visitors.h

Index: components/sync/protocol/proto_visitors.h
diff --git a/components/sync/protocol/proto_visitors.h b/components/sync/protocol/proto_visitors.h
index 31b343b39645d0fd515994eb2d5198540686d3d6..9ac274b2b0cf7375f7882681db4d90026d000089 100644
--- a/components/sync/protocol/proto_visitors.h
+++ b/components/sync/protocol/proto_visitors.h
@@ -827,6 +827,20 @@ VISIT_PROTO_FIELDS(const sync_pb::TimeRangeDirective& proto) {
   VISIT(end_time_usec);
 }
 
+VISIT_PROTO_FIELDS(const sync_pb::TranslateLanguageDetection& proto) {
+  VISIT(detected_language_code);
+  VISIT(probability);
+  VISIT(text_bytes);
+  VISIT(is_reliable);
+  VISIT(final_language_decision);
+}
+
+VISIT_PROTO_FIELDS(const sync_pb::TranslateInteraction& proto) {
+  VISIT(user_set_from_language_code);
+  VISIT(user_set_to_language_code);
+  VISIT_ENUM(interaction);
+}
+
 VISIT_PROTO_FIELDS(const sync_pb::TypeHint& proto) {
   VISIT(data_type_id);
   VISIT(has_valid_hint);
@@ -851,6 +865,8 @@ VISIT_PROTO_FIELDS(const sync_pb::UserEventSpecifics& proto) {
   VISIT(event_time_usec);
   VISIT(navigation_id);
   VISIT(session_id);
+  VISIT(translate_language_detection);
+  VISIT(translate_interaction);
 }
 
 VISIT_PROTO_FIELDS(const sync_pb::WalletMaskedCreditCard& proto) {