Fixed a compile error

client/dom/benchmarks/dromaeo/Dromaeo.dart

 #import('dart:dom');
 #import('dart:json');
 #import('Suites.dart');
 
 main() {
    window.onload = (Event evt) {
     new Dromaeo().run();
   };
 }
 
@@ skipping 72 matching lines @@
     div.setAttribute('class', clazz);
     return div;
   }
 }
 
 class Dromaeo {
   final List<SuiteController> _suiteControllers;
   Function _handler;
 
   Dromaeo()
-      : _suiteControllers = new List<SuiteController>(),
-        _handler = _createHandler()
+      : _suiteControllers = new List<SuiteController>()
   {
+    _handler = _createHandler();
     window.addEventListener(
         'message',
         (MessageEvent event) {
           try {
             final response = JSON.parse(event.data);
             _handler = _handler(response['command'], response['data']);
           } catch (final e, final stacktrace) {
             window.alert('Exception: ${e}: ${stacktrace}');
           }
         },
@@ skipping 93 matching lines @@
   }
 
   HTMLElement _byId(String id) {
     return document.getElementById(id);
   }
 
   int get _suitesTotal() {
     return _suiteControllers.length;
   }
 }