Remove spawnDomFunction from dart:html

tests/html/dom_isolates_test.dart

-// 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
-
-library DOMIsolatesTest;
-import '../../pkg/unittest/lib/unittest.dart';
-import '../../pkg/unittest/lib/html_config.dart';
-import 'dart:html';
-import 'dart:isolate';
-
-childDomIsolate() {
-  port.receive((msg, replyTo) {
-    if (msg != 'check') {
-      replyTo.send('wrong msg: $msg');
-    }
-    replyTo.send('${window.location}');
-    port.close();
-  });
-}
-
-trampolineIsolate() {
-  final future = spawnDomFunction(childDomIsolate);
-  port.receive((msg, parentPort) {
-    future.then((childPort) {
-      childPort.call(msg).then((response) {
-        parentPort.send(response);
-        port.close();
-      });
-    });
-  });
-}
-
-dummy() => print('Bad invocation of top-level function');
-
-main() {
-  useHtmlConfiguration();
-
-  test('Simple DOM isolate test', () {
-    spawnDomFunction(childDomIsolate).then(expectAsync1(
-        (sendPort) {
-            expect(sendPort.call('check'), completion('${window.location}'));
-        }
-    ));
-  });
-
-  test('Nested DOM isolates test', () {
-    spawnDomFunction(trampolineIsolate).then(expectAsync1(
-        (sendPort) {
-            expect(sendPort.call('check'), completion('${window.location}'));
-        }
-    ));
-  });
-
-  test('Spawn DOM isolate from pure', () {
-    expect(spawnFunction(trampolineIsolate).call('check'),
-           completion('${window.location}'));
-  });
-
-  test('Spawn DOM by uri', () {
-    spawnDomUri('dom_isolates_test.dart.child_isolate.dart').then(expectAsync1(
-        (sendPort) {
-            expect(sendPort.call('check'), completion('${window.location}'));
-        }
-    ));
-  });
-
-  test('Not function', () {
-      expect(() => spawnDomFunction(42), throws);
-  });
-
-  test('Not topLevelFunction', () {
-    var closure = guardAsync(() {});
-    expect(() => spawnDomFunction(closure), throws);
-  });
-
-  test('Masked local function', () {
-    var local = 42;
-    dummy() => print('Bad invocation of local function: $local');
-    expect(() => spawnDomFunction(dummy), throws);
-  });
-}