Making almost all dom_ methods private. Exceptions will be addressed in a later CL.

tools/dom/templates/html/impl/impl_HTMLTemplateElement.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.
 
 // WARNING: Do not edit - generated code.
 
 part of $LIBRARYNAME;
 
 /**
  * Model-Driven Views (MDV)'s native features enables a wide-range of use cases,
@@ skipping 77 matching lines @@
   getInstanceModel(Element template, model) => model;
 }
 
 @Experimental()
 $(ANNOTATIONS)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
 $!MEMBERS
 
   // For real TemplateElement use the actual DOM .content field instead of
   // our polyfilled expando.
   @Experimental()
-  DocumentFragment get content => $dom_content;
+  DocumentFragment get content => _content;
 
 
   /**
    * The MDV package, if available.
    *
    * This can be used to initialize MDV support via:
    *
    *     import 'dart:html';
    *     import 'package:mdv/mdv.dart' as mdv;
    *     main() {
@@ skipping 174 matching lines @@
 td[template],
 caption[template],
 colgroup[template],
 col[template],
 option[template] {
   display: none;
 }''';
     document.head.append(style);
   }
 }