$OpenBSD$

index 9d4cb06..673e567 100644
--- dom/bindings/DOMJSProxyHandler.h.orig	Fri Feb 20 15:40:37 2015
+++ dom/bindings/DOMJSProxyHandler.h	Fri Feb 20 15:40:37 2015
@@ -51,6 +51,9 @@ public:
   bool getPropertyDescriptor(JSContext* cx, JS::Handle<JSObject*> proxy,
                              JS::Handle<jsid> id,
                              JS::MutableHandle<JSPropertyDescriptor> desc) MOZ_OVERRIDE;
+  bool getOwnPropertyDescriptor(JSContext* cx, JS::Handle<JSObject*> proxy,
+                                JS::Handle<jsid> id,
+                                JS::MutableHandle<JSPropertyDescriptor> desc) MOZ_OVERRIDE;
 
   bool watch(JSContext* cx, JS::Handle<JSObject*> proxy, JS::Handle<jsid> id,
              JS::Handle<JSObject*> callable) MOZ_OVERRIDE;
@@ -72,6 +75,16 @@ protected:
   virtual bool ownPropNames(JSContext* cx, JS::Handle<JSObject*> proxy,
                             unsigned flags,
                             JS::AutoIdVector& props) = 0;
+
+  // Hook for subclasses to allow set() to ignore named props while other things
+  // that look at property descriptors see them.  This is intentionally not
+  // named getOwnPropertyDescriptor to avoid subclasses that override it hiding
+  // our public getOwnPropertyDescriptor.
+  virtual bool getOwnPropDescriptor(JSContext* cx,
+                                    JS::Handle<JSObject*> proxy,
+                                    JS::Handle<jsid> id,
+                                    bool ignoreNamedProps,
+                                    JS::MutableHandle<JSPropertyDescriptor> desc) = 0;
 };
 
 class DOMProxyHandler : public BaseDOMProxyHandler