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

tools/dom/templates/html/impl/impl_XMLHttpRequest.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;
 
 /**
  * A utility for retrieving data from a URL.
  *
  * HttpRequest can be used to obtain data from http, ftp, and file
  * protocols.
  *
  * For example, suppose we're developing these API docs, and we
  * wish to retrieve the HTML of the top-level page and print it out.
  * The easiest way to do that would be:
@@ skipping 40 matching lines @@
    * * If `Access-Control-Expose-Headers` has not been set to true, only a subset of all the response headers will be returned when calling [getAllRequestHeaders].
    *
    * See also: [authorization headers](http://en.wikipedia.org/wiki/Basic_access_authentication).
    */
   factory $CLASSNAME.getWithCredentials(String url,
       onComplete($CLASSNAME request)) =>
       _HttpRequestUtils.get(url, onComplete, true);
 
 $!MEMBERS
 }