[DevTools] Extracted EventListenersTreeOutline

LayoutTests/inspector/elements/event-listeners-about-blank-expected.txt

Index: LayoutTests/inspector/elements/event-listeners-about-blank-expected.txt
diff --git a/LayoutTests/inspector/elements/event-listeners-about-blank-expected.txt b/LayoutTests/inspector/elements/event-listeners-about-blank-expected.txt
index d44bd35dbd1bb457ce65f75b00a32abe9fc6e2da..3a315dda4da39edffbe25c3ce473d8c2d9b47b4a 100644
--- a/LayoutTests/inspector/elements/event-listeners-about-blank-expected.txt
+++ b/LayoutTests/inspector/elements/event-listeners-about-blank-expected.txt
@@ -4,15 +4,11 @@ Tests event listeners output in the Elements sidebar panel when the listeners ar
 
 ======== click ========
 [expanded] bodyevent-listeners-about-blank.html:9
-    attachment: script
-    handler: function f() {}
-    node: body
     useCapture: true
+    handler: function f() {}
 
 ======== hover ========
 [expanded] div#div-in-iframeevent-listeners-about-blank.html:9
-    attachment: script
-    handler: function f() {}
-    node: div#div-in-iframe
     useCapture: true
+    handler: function f() {}