Making all callbacks use zones

tools/dom/templates/html/dart2js/html_dart2js.darttemplate

Index: tools/dom/templates/html/dart2js/html_dart2js.darttemplate
diff --git a/tools/dom/templates/html/dart2js/html_dart2js.darttemplate b/tools/dom/templates/html/dart2js/html_dart2js.darttemplate
index c2868a9504b613f349195ac2d39f5215f2a47752..9bc443a8f4c7d8f71074cf971fd28e2ed02daef2 100644
--- a/tools/dom/templates/html/dart2js/html_dart2js.darttemplate
+++ b/tools/dom/templates/html/dart2js/html_dart2js.darttemplate
@@ -53,7 +53,7 @@ import 'dart:_js_helper' show
     makeLeafDispatchRecord;
 import 'dart:_interceptors' show
     Interceptor, JSExtendableArray, findInterceptorConstructorForType,
-    findConstructorForWebComponentType, getNativeInterceptor, 
+    findConstructorForWebComponentType, getNativeInterceptor,
     setDispatchProperty, findInterceptorForType;
 import 'dart:_isolate_helper' show IsolateNatives;
 import 'dart:_foreign_helper' show JS;
@@ -147,3 +147,9 @@ int _getNewIsolateId() {
 _callPortSync(int id, message) {
   return JS('var', r'ReceivePortSync.dispatchCall(#, #)', id, message);
 }
+
+_wrapZone(callback) {

[Emily Fortuna, 2013/10/14 17:30:39]

feels a little suboptimal to put the identical code in both templates. Perhaps
put it in the top level in the impl_Window.dart file? All the other functions in
this file seem to have specific dart2js implementations.

[blois, 2013/10/14 19:48:50]

Done.

+  // For performance reasons avoid wrapping if we are in the root zone.
+  if (Zone.current == Zone.ROOT) return callback;
+  return Zone.current.bindUnaryCallback(callback, runGuarded: true);
+}