[polymer] Fix bad merge in table.html

tracing/tracing/ui/base/table.html

Index: tracing/tracing/ui/base/table.html
diff --git a/tracing/tracing/ui/base/table.html b/tracing/tracing/ui/base/table.html
index 64693c27701db597d6a0b9082eec561e4abe5f4e..d8004588ddc970b778969af4453fc5320f61987b 100644
--- a/tracing/tracing/ui/base/table.html
+++ b/tracing/tracing/ui/base/table.html
@@ -1172,10 +1172,10 @@ tr.exportTo('tr.ui.b', function() {
         var cell = this.headerCells_[index];
         cell.selected = true;
       }
-      var e = new tr.b.Event('selected-column-changed');
-      e.column = column;
-      e.selected = column !== undefined;
-      cell.dispatchEvent(e);
+      var event = {column: column, selected: column !== undefined};
+      this.onSelectedColumnChanged_(event);
+      tr.b.dispatchSimpleEvent(
+          this, 'selected-column-changed', true, false, event);
     },
 
     get selectedTableRow() {