Revert r20668.

tools/dom/src/native_DOMImplementation.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.
 
 part of html;
 
 class _Utils {
   static double dateTimeToDouble(DateTime dateTime) =>
       dateTime.millisecondsSinceEpoch.toDouble();
   static DateTime doubleToDateTime(double dateTime) {
@@ skipping 40 matching lines @@
 
   static bool isMap(obj) => obj is Map;
 
   static Map createMap() => {};
 
   static makeUnimplementedError(String fileName, int lineNo) {
     return new UnsupportedError('[info: $fileName:$lineNo]');
   }
 
   static window() native "Utils_window";
+  static print(String message) native "Utils_print";
   static forwardingPrint(String message) native "Utils_forwardingPrint";
   static void spawnDomFunction(Function topLevelFunction, int replyTo) native "Utils_spawnDomFunction";
   static int _getNewIsolateId() native "Utils_getNewIsolateId";
   static bool shadowRootSupported(Document document) native "Utils_shadowRootSupported";
 }
 
 class _NPObject extends NativeFieldWrapperClass1 {
   _NPObject.internal();
   static _NPObject retrieve(String key) native "NPObject_retrieve";
   property(String propertyName) native "NPObject_property";
@@ skipping 53 matching lines @@
   String putIfAbsent(String key, String ifAbsent()) => Maps.putIfAbsent(this, key, ifAbsent);
   String remove(String key) native "DOMStringMap_remove_Callback";
   void clear() => Maps.clear(this);
   void forEach(void f(String key, String value)) => Maps.forEach(this, f);
   Collection<String> get keys native "DOMStringMap_getKeys_Callback";
   Collection<String> get values => Maps.getValues(this);
   int get length => Maps.length(this);
   bool get isEmpty => Maps.isEmpty(this);
 }
 
-final Future<SendPort> _HELPER_ISOLATE_PORT =
-    spawnDomFunction(_helperIsolateMain);
-
-final _TIMER_REGISTRY = new Map<SendPort, Timer>();
-
-const _NEW_TIMER = 'NEW_TIMER';
-const _CANCEL_TIMER = 'CANCEL_TIMER';
-const _TIMER_PING = 'TIMER_PING';
-const _PRINT = 'PRINT';
-
-_helperIsolateMain() {
-  port.receive((msg, replyTo) {
-    final cmd = msg[0];
-    if (cmd == _NEW_TIMER) {
-      final duration = new Duration(milliseconds: msg[1]);
-      bool periodic = msg[2];
-      final callback = () { replyTo.send(_TIMER_PING); };
-      _TIMER_REGISTRY[replyTo] = periodic ?
-          new Timer.periodic(duration, callback) :
-          new Timer(duration, callback);
-    } else if (cmd == _CANCEL_TIMER) {
-      _TIMER_REGISTRY.remove(replyTo).cancel();
-    } else if (cmd == _PRINT) {
-      final message = msg[1];
-      // TODO(antonm): we need somehow identify those isolates.
-      print('[From isolate] $message');
-    }
-  });
-}
-
-final _printClosure = window.console.log;
-final _pureIsolatePrintClosure = (s) {
-  _HELPER_ISOLATE_PORT.then((sendPort) {
-    sendPort.send([_PRINT, s]);
-  });
+get _printClosure => (s) {
+  try {
+    window.console.log(s);
+  } catch (_) {
+    _Utils.print(s);
+  }
 };
 
 final _forwardingPrintClosure = _Utils.forwardingPrint;