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dart/lib/compiler/implementation/js_backend/emitter.dart

Index: dart/lib/compiler/implementation/js_backend/emitter.dart
diff --git a/dart/lib/compiler/implementation/js_backend/emitter.dart b/dart/lib/compiler/implementation/js_backend/emitter.dart
index 85cd4919ed4fe15daf750437849cd527e5c07895..cab4254dae64991801d2c0a9604b651dbc42bc1c 100644
--- a/dart/lib/compiler/implementation/js_backend/emitter.dart
+++ b/dart/lib/compiler/implementation/js_backend/emitter.dart
@@ -1226,15 +1226,31 @@ $mainEnsureGetter
       mainCall = '${namer.isolateAccess(main)}()';
     }
     buffer.add("""
+
+//
+// BEGIN invoke [main].
+//
 if (typeof document != 'undefined' && document.readyState != 'complete') {
   document.addEventListener('readystatechange', function () {
     if (document.readyState == 'complete') {
-      ${mainCall};
+      if (typeof dartMainRunner == 'function') {
+        dartMainRunner(function() { ${mainCall}; });
+      } else {
+        ${mainCall};
+      }
     }
   }, false);
 } else {
-  ${mainCall};
+  if (typeof dartMainRunner == 'function') {
+    dartMainRunner(function() { ${mainCall}; });
+  } else {
+    ${mainCall};
+  }
 }
+//
+// END invoke [main].
+//
+
 """);
   }