Fixing TouchEvent.supported

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index 4abacc60abb0946e9c7882ef4531bf9e82f42631..d228722aec03ba2130b42038a73961942ca53fbc 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -26043,12 +26043,7 @@ class TouchEvent extends UIEvent native "TouchEvent" {
    * Note that touch events are only supported if the user is using a touch
    * device.
    */
-  static bool get supported {
-    if (JS('bool', '"ontouchstart" in window')) {
-      return Device.isEventTypeSupported('TouchEvent');
-    }
-    return false;
-  }
+  static bool get supported => Device.isEventTypeSupported('TouchEvent');
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a