Adding a visibility property to cr.ui.table.TableColumn.

ui/webui/resources/js/cr/ui/table/table_list.js

Index: ui/webui/resources/js/cr/ui/table/table_list.js
diff --git a/ui/webui/resources/js/cr/ui/table/table_list.js b/ui/webui/resources/js/cr/ui/table/table_list.js
index df39c0ec73d1e0047facbb051da3f174ec3b68cc..eb869013c73b519ac81df99635d1ac549bab7f01 100644
--- a/ui/webui/resources/js/cr/ui/table/table_list.js
+++ b/ui/webui/resources/js/cr/ui/table/table_list.js
@@ -174,6 +174,8 @@ cr.define('cr.ui.table', function() {
         cell.className = 'table-row-cell';
         if (cm.isEndAlign(i))
           cell.style.textAlign = 'end';
+        if (!cm.isVisible(i))
+          cell.style.display = 'none';
         cell.appendChild(
             cm.getRenderFunction(i).call(null, dataItem, cm.getId(i), table));