Extend WrapperNew.

src/glue.rs

@@ -202,7 +202,8 @@ extern "C" {
                           call: *mut JSObject, construct: *mut JSObject)
      -> *mut JSObject;
     pub fn WrapperNew(aCx: *mut JSContext, aObj: HandleObject,
-                      aHandler: *const ::libc::c_void)
+                      aHandler: *const ::libc::c_void, aClass: *const JSClass,
+                      aSingleton: bool)
      -> *mut JSObject;
     pub fn GetProxyExtra(obj: *mut JSObject, slot: u32) -> Value;
     pub fn GetProxyPrivate(obj: *mut JSObject) -> Value;

src/jsglue.cpp

@@ -508,9 +508,15 @@ NewProxyObject(JSContext* aCx, const void* aHandler, JS::HandleValue aPriv,
 }
 
 JSObject*
-WrapperNew(JSContext* aCx, JS::HandleObject aObj, const void* aHandler)
+WrapperNew(JSContext* aCx, JS::HandleObject aObj, const void* aHandler,
+           const JSClass* aClass, bool aSingleton)
 {
-    return js::Wrapper::New(aCx, aObj, (const js::Wrapper*)aHandler);
+    js::WrapperOptions options;
+    if (aClass) {
+        options.setClass(js::Valueify(aClass));
+    }
+    options.setSingleton(aSingleton);
+    return js::Wrapper::New(aCx, aObj, (const js::Wrapper*)aHandler, options);
 }
 
 jsval