Fixes for Blink roll to r151189

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

 // Copyright (c) 2011, 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;
 
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
-  factory $CLASSNAME() => _$(CLASSNAME)FactoryProvider.createDocumentFragment();
-
   factory $CLASSNAME.html(String html) =>
       _$(CLASSNAME)FactoryProvider.createDocumentFragment_html(html);
 
   factory $CLASSNAME.svg(String svgContent) =>
       _$(CLASSNAME)FactoryProvider.createDocumentFragment_svg(svgContent);
 
 $if DART2JS
   // Native field is used only by Dart code so does not lead to instantiation
   // of native classes
   @Creates('Null')
@@ skipping 51 matching lines @@
   /**
    * Parses the specified text as HTML and adds the resulting node after the
    * last child of this document fragment.
    */
   void appendHtml(String text) {
     this.append(new DocumentFragment.html(text));
   }
 
 $!MEMBERS
 }