DevTools: Clean up the Event Listeners pane data representation

Source/core/inspector/InspectorDOMAgent.cpp

Index: Source/core/inspector/InspectorDOMAgent.cpp
diff --git a/Source/core/inspector/InspectorDOMAgent.cpp b/Source/core/inspector/InspectorDOMAgent.cpp
index cb4a199fc7f5f99d70c0e7fffe32519538416493..a2e45b3dc81b7d9e74985077c4075b5242b66734 100644
--- a/Source/core/inspector/InspectorDOMAgent.cpp
+++ b/Source/core/inspector/InspectorDOMAgent.cpp
@@ -1797,11 +1797,10 @@ PassRefPtr<TypeBuilder::Array<TypeBuilder::DOM::Node> > InspectorDOMAgent::build
 PassRefPtr<TypeBuilder::DOM::EventListener> InspectorDOMAgent::buildObjectForEventListener(const RegisteredEventListener& registeredEventListener, const AtomicString& eventType, Node* node, const String* objectGroupId)
 {
     RefPtr<EventListener> eventListener = registeredEventListener.listener;
-    String sourceName;
     String scriptId;
     int lineNumber;
     int columnNumber;
-    if (!eventListenerHandlerLocation(&node->document(), eventListener.get(), sourceName, scriptId, lineNumber, columnNumber))
+    if (!eventListenerHandlerLocation(&node->document(), eventListener.get(), scriptId, lineNumber, columnNumber))
         return nullptr;
 
     Document& document = node->document();
@@ -1832,8 +1831,6 @@ PassRefPtr<TypeBuilder::DOM::EventListener> InspectorDOMAgent::buildObjectForEve
             }
         }
     }
-    if (!sourceName.isEmpty())
-        value->setSourceName(sourceName);
     return value.release();
 }