Cleaning up the TableElement API

tools/dom/templates/html/impl/impl_HTMLTableRowElement.darttemplate

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of $LIBRARYNAME;
 
+@DocsEditable
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
-$!MEMBERS
-  factory SpeechRecognition() {
-    return JS('SpeechRecognition',
-        'new (window.SpeechRecognition || window.webkitSpeechRecognition)()');
+
+  @DomName('HTMLTableRowElement.cells')
+  List<TableCellElement> get cells =>
+      new _WrappedList<TableCellElement>($dom_cells);
+
+  TableCellElement addCell() {
+    return insertCell(-1);
   }
-}
+
+  TableCellElement insertCell(int index) => $dom_insertCell(index);
+
+$!MEMBERS}