Remove spawnDomFunction from dart:html

tools/dom/src/native_DOMPublic.dart

 // 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.
 
 part of html;
 
-_makeSendPortFuture(spawnRequest) {
-  final completer = new Completer<SendPort>.sync();
-  final port = new ReceivePort();
-  port.receive((result, _) {
-    completer.complete(result);
-    port.close();
-  });
-  // TODO: SendPort.hashCode is ugly way to access port id.
-  spawnRequest(port.toSendPort().hashCode);
-  return completer.future;
-}
-
-// This API is exploratory.
-Future<SendPort> spawnDomFunction(Function f) =>
-    _makeSendPortFuture((portId) { _Utils.spawnDomFunction(f, portId); });
-
-Future<SendPort> spawnDomUri(String uri) =>
-    _makeSendPortFuture((portId) { _Utils.spawnDomUri(uri, portId); });
-
 // testRunner implementation.
 // FIXME: provide a separate lib for testRunner.
 
 var _testRunner;
 
 TestRunner get testRunner {
   if (_testRunner == null)
     _testRunner = new TestRunner._(_NPObject.retrieve("testRunner"));
   return _testRunner;
 }
 
 class TestRunner {
   final _NPObject _npObject;
 
   TestRunner._(this._npObject);
 
   display() => _npObject.invoke('display');
   dumpAsText() => _npObject.invoke('dumpAsText');
   notifyDone() => _npObject.invoke('notifyDone');
   setCanOpenWindows() => _npObject.invoke('setCanOpenWindows');
   waitUntilDone() => _npObject.invoke('waitUntilDone');
 }