No-op changes.

remove unused constant.

PiperOrigin-RevId: 799312901

Author: zzzaries

frontend/app/common/constants/constants.ts

@@ -83,13 +83,6 @@ export const GRAPH_TYPE_DEFAULT = 'xla';
 export const HLO_TOOLS =
     ['memory_viewer', 'graph_viewer'];
 
-/** The query parameter keys used in trace viewer */
-// TODO(yinzz): update the key in tf-trace-viewr.html to this one for
-// consistency
-export const TRACE_VIEWER_QUERY_PARAMS_KEYS = {
-  'host': 'host',
-};
-
 /** The query parameter keys used in graph viewer */
 export const GRAPHVIZ_PAN_ZOOM_CONTROL = '&pan_zoom=1&pan_zoom_controls=1';
 

plugin/trace_viewer/tf_trace_viewer/tf-trace-viewer.html

@@ -1389,8 +1389,12 @@
 
     _perfettoButtonOnclickCallback: function() {
       const sessionPerfettoUrl = new URL(`/perfetto/${this._sessionId}`, window.location.href);
-      if (this._selectedHosts.length) {
-        sessionPerfettoUrl.searchParams.set('hosts', this._selectedHosts.join(','));
+      const relatedParams = ['host', 'hosts', 'host_index', 'trace_filter_config'];
+      for (const param of relatedParams) {
+        const value = this._buildBaseURL().searchParams.get(param);
+        if (value) {
+          sessionPerfettoUrl.searchParams.set(param, value);
+        }
       }
       window.open(sessionPerfettoUrl.toString());
     },