Revert "Zone support for Futures."

runtime/lib/timer_patch.dart

Index: runtime/lib/timer_patch.dart
diff --git a/runtime/lib/timer_patch.dart b/runtime/lib/timer_patch.dart
index 87026b10c22bbb57143eadc2ed9ea8771c5de7c9..2db2343720a1e6ad6e14c7f6b9ea351075bbd68d 100644
--- a/runtime/lib/timer_patch.dart
+++ b/runtime/lib/timer_patch.dart
@@ -2,26 +2,27 @@
 // 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.
 
-patch Timer _createTimer(Duration duration, void callback()) {
-  if (_TimerFactory._factory == null) {
-    throw new UnsupportedError("Timer interface not supported.");
+patch class Timer {
+  /* patch */ factory Timer(Duration duration, void callback()) {
+    if (_TimerFactory._factory == null) {
+      throw new UnsupportedError("Timer interface not supported.");
+    }
+    int milliseconds = duration.inMilliseconds;
+    if (milliseconds < 0) milliseconds = 0;
+    return _TimerFactory._factory(milliseconds, (_) { callback(); }, false);
   }
-  int milliseconds = duration.inMilliseconds;
-  if (milliseconds < 0) milliseconds = 0;
-  return _TimerFactory._factory(milliseconds, (_) { callback(); }, false);
-}
 
-patch Timer _createPeriodicTimer(Duration duration,
-                                 void callback(Timer timer)) {
-  if (_TimerFactory._factory == null) {
-    throw new UnsupportedError("Timer interface not supported.");
+  /* patch */ factory Timer.periodic(Duration duration,
+                                     void callback(Timer timer)) {
+    if (_TimerFactory._factory == null) {
+      throw new UnsupportedError("Timer interface not supported.");
+    }
+    int milliseconds = duration.inMilliseconds;
+    if (milliseconds < 0) milliseconds = 0;
+    return _TimerFactory._factory(milliseconds, callback, true);
   }
-  int milliseconds = duration.inMilliseconds;
-  if (milliseconds < 0) milliseconds = 0;
-  return _TimerFactory._factory(milliseconds, callback, true);
 }
 
-
 typedef Timer _TimerFactoryClosure(int milliseconds,
                                    void callback(Timer timer),
                                    bool repeating);