Renaming dart:html library from 'html' to 'dart.html'

tools/dom/templates/html/impl/impl_Document.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.
 
-part of html;
+part of $LIBRARYNAME;
 
 /**
  * The base class for all documents.
  *
  * Each web page loaded in the browser has its own [Document] object, which is
  * typically an [HtmlDocument].
  *
  * If you aren't comfortable with DOM concepts, see the Dart tutorial
  * [Target 2: Connect Dart & HTML](http://www.dartlang.org/docs/tutorials/connect-dart-html/).
  */
@@ skipping 56 matching lines @@
       final copyOfMatches = new List<Element>.fixedLength(len);
       for (int i = 0; i < len; ++i) {
         copyOfMatches[i] = mutableMatches[i];
       }
       return new _FrozenElementList._wrap(copyOfMatches);
     } else {
       return new _FrozenElementList._wrap($dom_querySelectorAll(selectors));
     }
   }
 }