[DevTools] Fixed blink of "No Event Listeners" in event listeners sidebar

LayoutTests/http/tests/inspector/elements-test.js

 var initialize_ElementTest = function() {
 
 InspectorTest.preloadPanel("elements");
 
 InspectorTest.inlineStyleSection = function()
 {
     return WebInspector.panels.elements.sidebarPanes.styles._sectionBlocks[0].sections[0];
 }
 
 InspectorTest.computedStyleWidget = function()
@@ skipping 402 matching lines @@
 
 InspectorTest.eventListenersWidget = function()
 {
     var sidebarPane = WebInspector.panels.elements.sidebarPanes.eventListeners;
     sidebarPane.expand();
     return sidebarPane.children()[0];
 }
 
 InspectorTest.expandAndDumpSelectedElementEventListeners = function(callback)
 {
-    InspectorTest.addSniffer(WebInspector.EventListenersWidget.prototype, "_eventListenersArrivedForTest", listenersArrived);
+    InspectorTest.addSniffer(WebInspector.EventListenersView.prototype, "_eventListenersArrivedForTest", listenersArrived);
 
     var eventListenersWidget = InspectorTest.eventListenersWidget();
 
     function listenersArrived()
     {
         var listenerTypes = eventListenersWidget._eventListenersView._treeOutline.rootElement().children();
         for (var i = 0; i < listenerTypes.length; ++i) {
             listenerTypes[i].expand();
             var listenerItems = listenerTypes[i].children();
             for (var j = 0; j < listenerItems.length; ++j)
@@ skipping 559 matching lines @@
         for (nodeRow of nodeUI._rows) {
             for (var ui of nodeRow.animations) {
                 InspectorTest.addResult(ui._nameElement.outerHTML);
                 InspectorTest.addResult(ui._svg.outerHTML);
             }
         }
     }
 }
 
 };