as per jst review of dom part of 66318 added what was in this file a native descriptor. it is not necessary any more

layout/base/nsIChromeEventHandler.idl

@@ -25,11 +25,9 @@
 
 %{ C++
 #include "nsIPresContext.h"
-#include "nsIDOMEvent.h"
 %}
 
 [ptr] native nsIPresContext(nsIPresContext);
-[ptr] native nsIDOMEvent(nsIDOMEvent);
 native nsEvent(nsEvent);
 [ptr] native nsEventPtr(nsEvent);
 native nsEventStatus(nsEventStatus);

layout/base/public/nsIChromeEventHandler.idl

@@ -25,11 +25,9 @@
 
 %{ C++
 #include "nsIPresContext.h"
-#include "nsIDOMEvent.h"
 %}
 
 [ptr] native nsIPresContext(nsIPresContext);
-[ptr] native nsIDOMEvent(nsIDOMEvent);
 native nsEvent(nsEvent);
 [ptr] native nsEventPtr(nsEvent);
 native nsEventStatus(nsEventStatus);