sdk/lib/html/dartium/html_dartium.dart

Index: sdk/lib/html/dartium/html_dartium.dart
diff --git a/sdk/lib/html/dartium/html_dartium.dart b/sdk/lib/html/dartium/html_dartium.dart
index 9b787e4f2baa09321a6697f220ddb7a412ad4c1a..29a417ad3c74a7c287a970a80822a308d7bde81f 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -37039,36 +37039,33 @@ final _pureIsolateUriBaseClosure = () {
                                "is not supported in the browser");
 };
 
-class _Timer implements Timer {
-  const int _STATE_TIMEOUT = 0;
-  const int _STATE_INTERVAL = 1;
-  var _state;
+ class _Timer implements Timer {
+  var _canceler;
 
   _Timer(int milliSeconds, void callback(Timer timer), bool repeating) {
+
     if (repeating) {
-      _state = window._setInterval(() {
+      int id = window._setInterval(() {
         callback(this);
-      }, milliSeconds) * 2 + _STATE_INTERVAL;
+      }, milliSeconds);
+      _canceler = () => window._clearInterval(id);
     } else {
-      _state = window._setTimeout(() {
-        _state = null;
+      int id = window._setTimeout(() {
+        _canceler = null;
         callback(this);
-      }, milliSeconds) * 2 + _STATE_TIMEOUT;
+      }, milliSeconds);
+      _canceler = () => window._clearTimeout(id);
     }
   }
 
   void cancel() {
-    if (_state == null) return;
-    int id = _state ~/ 2;
-    if ((_state & 1) == _STATE_TIMEOUT) {
-      window._clearTimeout(id);
-    } else {
-      window._clearInterval(id);
+    if (_canceler != null) {
+      _canceler();
     }
-    _state = null;
+    _canceler = null;
   }
 
-  bool get isActive => _state != null;
+  bool get isActive => _canceler != null;
 }
 
 get _timerFactoryClosure =>