UserEvent proto exploration for Translate use case.

components/sync/protocol/proto_enum_conversions.cc

Index: components/sync/protocol/proto_enum_conversions.cc
diff --git a/components/sync/protocol/proto_enum_conversions.cc b/components/sync/protocol/proto_enum_conversions.cc
index cc2459cfafb8c7d66ad5df7d5d7338e7a56d9277..3f1f176eca1cb417ffb47aba08ce20a0afb82729 100644
--- a/components/sync/protocol/proto_enum_conversions.cc
+++ b/components/sync/protocol/proto_enum_conversions.cc
@@ -346,6 +346,24 @@ const char* ProtoEnumToString(sync_pb::TabNavigation::PasswordState state) {
   return "";
 }
 
+const char* ProtoEnumToString(
+    sync_pb::TranslateInteraction::Interaction interaction) {
+  ASSERT_ENUM_BOUNDS(sync_pb::TranslateInteraction, Interaction, UNKNOWN,
+                     IGNORED);
+  switch (interaction) {
+    ENUM_CASE(sync_pb::TranslateInteraction, UNKNOWN);
+    ENUM_CASE(sync_pb::TranslateInteraction, ACCEPTED);
+    ENUM_CASE(sync_pb::TranslateInteraction, ACCEPTED_ALWAYS);
+    ENUM_CASE(sync_pb::TranslateInteraction, REJECTED);
+    ENUM_CASE(sync_pb::TranslateInteraction, REJECTED_NEVER_LANGUAGE);
+    ENUM_CASE(sync_pb::TranslateInteraction, REJECTED_NEVER_SITE);
+    ENUM_CASE(sync_pb::TranslateInteraction, UNDO);
+    ENUM_CASE(sync_pb::TranslateInteraction, IGNORED);
+  }
+  NOTREACHED();
+  return "";
+}
+
 const char* ProtoEnumToString(
     sync_pb::ReadingListSpecifics::ReadingListEntryStatus status) {
   ASSERT_ENUM_BOUNDS(sync_pb::ReadingListSpecifics, ReadingListEntryStatus,