Sort overview chart in histogram-set-table-name-cell.

tracing/tracing/value/ui/histogram_set_table_row.html

Index: tracing/tracing/value/ui/histogram_set_table_row.html
diff --git a/tracing/tracing/value/ui/histogram_set_table_row.html b/tracing/tracing/value/ui/histogram_set_table_row.html
index 704c2d8be2002db1c68ae8f10014a36c99d8781c..f625441ab80ccb61b173a68de12030c5e315ac36 100644
--- a/tracing/tracing/value/ui/histogram_set_table_row.html
+++ b/tracing/tracing/value/ui/histogram_set_table_row.html
@@ -70,6 +70,15 @@ tr.exportTo('tr.v.ui', function() {
       return this.hierarchy_.columns;
     }
 
+    * sortedColumns() {
+      for (const col of this.baseTable_.tableColumns) {
+        yield [
+          col.displayLabel,
+          this.hierarchy_.columns.get(col.displayLabel),
+        ];
+      }
+    }
+
     /**
      * @return {!tr.b.Range}
      */