Revert r20668.

tools/dom/src/native_DOMImplementation.dart

Index: tools/dom/src/native_DOMImplementation.dart
===================================================================
--- tools/dom/src/native_DOMImplementation.dart	(revision 20693)
+++ tools/dom/src/native_DOMImplementation.dart	(working copy)
@@ -58,6 +58,7 @@
   }
 
   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";
@@ -131,41 +132,12 @@
   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;