Revert "Making all callbacks use zones"

tools/dom/src/shared_html.dart

Index: tools/dom/src/shared_html.dart
diff --git a/tools/dom/src/shared_html.dart b/tools/dom/src/shared_html.dart
deleted file mode 100644
index 165e9196c2be9f25b80b2badb07282956d66c550..0000000000000000000000000000000000000000
--- a/tools/dom/src/shared_html.dart
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright (c) 2013, 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 dart.dom.html;
-
-_wrapZone(callback) {
-  // For performance reasons avoid wrapping if we are in the root zone.
-  if (Zone.current == Zone.ROOT) return callback;
-  return Zone.current.bindUnaryCallback(callback, runGuarded: true);
-}
-
-Element query(String selector) => document.query(selector);
-ElementList queryAll(String selector) => document.queryAll(selector);