DevTools: Clean up the Event Listeners pane data representation

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

 function getInspectorHighlightJSON(nodeId, opt_frameId)
 {
     var doc = document;
     if (opt_frameId)
         doc = document.getElementById(opt_frameId).contentDocument;
     return window.internals.inspectorHighlightJSON(doc.getElementById(nodeId));
 }
 
 var initialize_ElementTest = function() {
 
@@ skipping 335 matching lines @@
     function objectsExpanded()
     {
         var eventListenerSections = WebInspector.panels.elements.sidebarPanes.eventListeners.sections;
         for (var i = 0; i < eventListenerSections.length; ++i) {
             var eventType = eventListenerSections[i]._title;
             InspectorTest.addResult("");
             InspectorTest.addResult("======== " + eventType + " ========");
             var eventBarChildren = eventListenerSections[i]._eventBars.children;
             for (var j = 0; j < eventBarChildren.length; ++j) {
                 var objectPropertiesSection = eventBarChildren[j]._section;
-                InspectorTest.dumpObjectPropertySection(objectPropertiesSection, {
-                    sourceName: formatSourceNameProperty
-                });
+                InspectorTest.dumpObjectPropertySection(objectPropertiesSection, {});
             }
         }
         callback();
     }
-
-    function formatSourceNameProperty(value)
-    {
-        return "[clipped-for-test]/" + value.replace(/(.*?\/)LayoutTests/, "LayoutTests");
-    }
 }
 
 InspectorTest.dumpObjectPropertySection = function(section, formatters)
 {
     var expandedSubstring = section.expanded ? "[expanded]" : "[collapsed]";
     var titleElement = section.titleElement.firstElementChild ? section.titleElement.firstElementChild.shadowRoot.lastChild.textContent : section.titleElement.textContent;
     InspectorTest.addResult(expandedSubstring + " " + titleElement + " " + section.subtitleAsTextForTest);
     if (!section.propertiesForTest)
         return;
 
@@ skipping 514 matching lines @@
     function innerCallback(result)
     {
         InspectorTest.addResult(nodeId + ": " + result.description);
         callback();
     }
     opt_frameId = opt_frameId || "";
     InspectorTest.evaluateInPage("getInspectorHighlightJSON(\"" + nodeId + "\", \"" + opt_frameId + "\")", innerCallback);
 }
 
 };