move top-level internal methods into a class

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

 // Copyright (c) 2012, 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;
 
 @Experimental
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
@@ skipping 37 matching lines @@
   static bool decorate(Element template, [Element instanceRef]) {
     // == true check because it starts as a null field.
     if (template._templateIsDecorated == true) return false;
 
     template._templateIsDecorated = true;
 
     _injectStylesheet();
 
     // Create content
     if (template is! TemplateElement) {
-      var doc = _getTemplateContentsOwner(template.document);
+      var doc = _Bindings._getTemplateContentsOwner(template.document);
       template._templateContent = doc.createDocumentFragment();
     }
 
     if (instanceRef != null) {
       template._templateInstanceRef = instanceRef;
       return true; // content is empty.
     }
 
     if (template is TemplateElement) {
-      _bootstrapTemplatesRecursivelyFrom(template.content);
+      bootstrap(template.content);
     } else {
-      _liftNonNativeTemplateChildrenIntoContent(template);
+      _Bindings._liftNonNativeChildrenIntoContent(template);
     }
 
     return true;
   }
 
   /**
    * This used to decorate recursively all templates from a given node.
    *
    * By default [decorate] will be called on templates lazily when certain
    * properties such as [model] are accessed, but it can be run eagerly to
    * decorate an entire tree recursively.
    */
   // TODO(rafaelw): Review whether this is the right public API.
   @Experimental
   static void bootstrap(Node content) {
-    _bootstrapTemplatesRecursivelyFrom(content);
+    _Bindings._bootstrapTemplatesRecursivelyFrom(content);
   }
 
   static bool _initStyles;
 
   static void _injectStylesheet() {
     if (_initStyles == true) return;
     _initStyles = true;
 
     var style = new StyleElement();
     style.text = r'''
@@ skipping 13 matching lines @@
     document.head.append(style);
   }
 
   /**
    * A mapping of names to Custom Syntax objects. See [CustomBindingSyntax] for
    * more information.
    */
   @Experimental
   static Map<String, CustomBindingSyntax> syntax = {};
 }