Revert "Add some sweet XML classes."

client/html/release/html.dart

Index: client/html/release/html.dart
diff --git a/client/html/release/html.dart b/client/html/release/html.dart
index 273b8808940fe741bdf56f2cb3dc5f635c1fc9dc..f2bac6dd81d263a52c9fec8be6d1db17e5b7bb41 100644
--- a/client/html/release/html.dart
+++ b/client/html/release/html.dart
@@ -11281,10 +11281,6 @@ interface DocumentFragment extends Element default DocumentFragmentWrappingImple
 
   DocumentFragment.html(String html);
 
-  DocumentFragment.xml(String xml);
-
-  DocumentFragment.svg(String svg);
-
   DocumentFragment clone(bool deep);
 }
 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
@@ -13455,45 +13451,6 @@ interface Worker extends AbstractWorker {
 
   WorkerEvents get on();
 }
-// 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.
-
-interface XMLDocument extends Document, XMLElement
-    default XMLDocumentWrappingImplementation {
-  XMLDocument.xml(String xml);
-
-  XMLElement get activeElement();
-
-  XMLDocument clone(bool deep);
-}
-// 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.
-
-interface XMLElement extends Element default XMLElementWrappingImplementation {
-
-  XMLElement.tag(String tag);
-  XMLElement.xml(String tag);
-
-  XMLElement get firstElementChild();
-
-  XMLElement get lastElementChild();
-
-  XMLElement get nextElementSibling();
-
-  XMLElement get previousElementSibling();
-
-  XMLElement get offsetParent();
-
-  XMLElement get parent();
-
-  XMLElement insertAdjacentElement([String where, XMLElement element]);
-
-  XMLElement query(String selectors);
-
-  XMLElement clone(bool deep);
-}
 // 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.
@@ -13532,7 +13489,7 @@ interface XMLHttpRequest extends EventTarget default XMLHttpRequestWrappingImple
 
   void set responseType(String value);
 
-  XMLDocument get responseXML();
+  Document get responseXML();
 
   int get status();