Bug 986940 - Remove Cu.createDateIn. r=gabor

When we switch ObjectWrapper.jsm to use Cu.cloneInto, this became unused.

js/xpconnect/idl/xpccomponents.idl

@@ -121,7 +121,7 @@ interface ScheduledGCCallback : nsISupports
 /**
 * interface of Components.utils
 */
-[scriptable, uuid(0b81b4f2-cad7-4602-a5cb-b99c9d514196)]
+[scriptable, uuid(587ae679-97bc-4571-accb-b14a4dcbca00)]
 interface nsIXPCComponents_Utils : nsISupports
 {
 
@@ -372,14 +372,6 @@ interface nsIXPCComponents_Utils : nsISupports
     [implicit_jscontext]
     jsval createArrayIn(in jsval vobj);
 
-    /*
-     * To be called from JS only.
-     *
-     * Returns a date given timestamp |msec| created in |vobj|'s compartment.
-     */
-    [implicit_jscontext]
-    jsval createDateIn(in jsval vobj, in long long msec);
-
     /*
      * To be called from JS only.
      *

js/xpconnect/src/XPCComponents.cpp

@@ -3067,34 +3067,6 @@ nsXPCComponents_Utils::CreateArrayIn(HandleValue vobj, JSContext *cx,
     return NS_OK;
 }
 
-/* jsval createDateIn(in jsval vobj, in long long msec); */
-NS_IMETHODIMP
-nsXPCComponents_Utils::CreateDateIn(HandleValue vobj, int64_t msec, JSContext *cx,
-                                    MutableHandleValue rval)
-{
-    if (!cx)
-        return NS_ERROR_FAILURE;
-
-    // first argument must be an object
-    if (!vobj.isObject())
-        return NS_ERROR_XPC_BAD_CONVERT_JS;
-
-    RootedObject obj(cx);
-    {
-        JSObject *scope = js::UncheckedUnwrap(&vobj.toObject());
-        JSAutoCompartment ac(cx, scope);
-        obj =  JS_NewDateObjectMsec(cx, msec);
-        if (!obj)
-            return NS_ERROR_FAILURE;
-    }
-
-    if (!JS_WrapObject(cx, &obj))
-        return NS_ERROR_FAILURE;
-
-    rval.setObject(*obj);
-    return NS_OK;
-}
-
 /* void makeObjectPropsNormal(jsval vobj); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::MakeObjectPropsNormal(HandleValue vobj, JSContext *cx)