Add case for VIEW_TIMELINE to iconForLink() utility

Release-Notes: skip
Google-Bug-Id: b/370077994
Change-Id: I9ce9a36255a9518dbc0a0bdf8077aae9edb83859
diff --git a/polygerrit-ui/app/models/checks/checks-util.ts b/polygerrit-ui/app/models/checks/checks-util.ts
index 51bfcd9..85a7be4 100644
--- a/polygerrit-ui/app/models/checks/checks-util.ts
+++ b/polygerrit-ui/app/models/checks/checks-util.ts
@@ -54,6 +54,8 @@
       return {name: 'code'};
     case LinkIcon.FILE_PRESENT:
       return {name: 'file_present'};
+    case LinkIcon.VIEW_TIMELINE:
+      return {name: 'view_timeline'};
     default:
       // We don't throw an assertion error here, because plugins don't have to
       // be written in TypeScript, so we may encounter arbitrary strings for