[DeprecateAs] if call addEventListener or removeEventListener without enough arguments

Source/core/events/EventTarget.h

Index: Source/core/events/EventTarget.h
diff --git a/Source/core/events/EventTarget.h b/Source/core/events/EventTarget.h
index 75fc4d20f138609f87464dc3e7f870af27098287..1b55783d64eb5d968d4cfa6d30ef7ff690694e99 100644
--- a/Source/core/events/EventTarget.h
+++ b/Source/core/events/EventTarget.h
@@ -89,6 +89,8 @@ public:
     // FIXME: first 2 args to addEventListener and removeEventListener should
     // be required (per spec), but throwing TypeError breaks legacy content.
     // http://crbug.com/353484
+    // FIXME: default values should be specified in IDL, not C++
+    // http://crbug.com/258153
     bool addEventListener() { return false; }
     bool addEventListener(const AtomicString& eventType) { return false; }
     virtual bool addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture = false);