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

tools/dom/templates/html/dart2js/impl_Window.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;
 
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS native "@*DOMWindow" {
 
   Document get document => JS('Document', '#.document', this);
 
   WindowBase _open2(url, name) => JS('Window', '#.open(#,#)', this, url, name);
 
   WindowBase _open3(url, name, options) =>
       JS('Window', '#.open(#,#,#)', this, url, name, options);
 
@@ skipping 148 matching lines @@
   static bool get _supportsSetImmediate =>
       JS('bool', '!!(window.setImmediate)');
 
   // Set immediate implementation for IE
   void _setImmediate(void callback()) {
     JS('void', '#.setImmediate(#)', this, convertDartClosureToJS(callback, 0));
   }
 
 $!MEMBERS
 }