Move add/removeEventListener() to custom bindings

Source/core/events/EventTarget.idl

Index: Source/core/events/EventTarget.idl
diff --git a/Source/core/events/EventTarget.idl b/Source/core/events/EventTarget.idl
index 540cecea55b37811da89c002e1abc83eee5f2356..77788e65e35efef2782f2565f9589a6d02b41474 100644
--- a/Source/core/events/EventTarget.idl
+++ b/Source/core/events/EventTarget.idl
@@ -29,7 +29,7 @@
     // legacy content.  http://crbug.com/353484
     // FIXME: type should not be nullable.
     // FIXME: capture should have a default value false.
-    [Custom=CallEpilogue] void addEventListener(optional DOMString? type, optional EventListener? listener, optional boolean capture);
-    [Custom=CallEpilogue] void removeEventListener(optional DOMString? type, optional EventListener? listener, optional boolean capture);
+    [Custom] void addEventListener(optional DOMString? type, optional EventListener? listener, optional boolean capture);
+    [Custom] void removeEventListener(optional DOMString? type, optional EventListener? listener, optional boolean capture);
     [RaisesException] boolean dispatchEvent(Event event);
 };