test: fix up weakref.cc deprecation warnings

test/gc/node_modules/weak/src/weakref.cc

@@ -181,10 +181,13 @@ Handle<Value> Create(const Arguments& args) {
   proxy_container *cont = (proxy_container *)
     malloc(sizeof(proxy_container));
 
-  cont->target = Persistent<Object>::New(args[0]->ToObject());
+  cont->target = Persistent<Object>::New(Isolate::GetCurrent(),
-  cont->callbacks = Persistent<Array>::New(Array::New());
+                                         args[0]->ToObject());
+  cont->callbacks = Persistent<Array>::New(Isolate::GetCurrent(),
+                                           Array::New());
 
-  cont->proxy = Persistent<Object>::New(proxyClass->NewInstance());
+  cont->proxy = Persistent<Object>::New(Isolate::GetCurrent(),
+                                        proxyClass->NewInstance());
   cont->proxy->SetAlignedPointerInInternalField(0, cont);
 
   cont->target.MakeWeak(Isolate::GetCurrent(),
@@ -289,7 +292,8 @@ Handle<Value> Callbacks(const Arguments& args) {
 void Initialize(Handle<Object> target) {
   HandleScope scope;
 
-  proxyClass = Persistent<ObjectTemplate>::New(ObjectTemplate::New());
+  proxyClass = Persistent<ObjectTemplate>::New(Isolate::GetCurrent(),
+                                               ObjectTemplate::New());
   proxyClass->SetNamedPropertyHandler(WeakNamedPropertyGetter,
                                       WeakNamedPropertySetter,
                                       WeakNamedPropertyQuery,