gin::Wrappable shouldn't inherit from base::RefCounted

mojo/apps/js/bindings/support.cc

Index: mojo/apps/js/bindings/support.cc
diff --git a/mojo/apps/js/bindings/support.cc b/mojo/apps/js/bindings/support.cc
index e07cc093721956c19ff764db56074458751d0db2..c08fcf625ae993687b14408bf2a55ad13f5b664e 100644
--- a/mojo/apps/js/bindings/support.cc
+++ b/mojo/apps/js/bindings/support.cc
@@ -24,15 +24,15 @@ namespace {
 WaitingCallback* AsyncWait(const gin::Arguments& args, mojo::Handle handle,
                            MojoWaitFlags flags,
                            v8::Handle<v8::Function> callback) {
-  scoped_refptr<WaitingCallback> waiting_callback =
+  gin::Handle<WaitingCallback> waiting_callback =
       WaitingCallback::Create(args.isolate(), callback);
 
   BindingsSupport::AsyncWaitID wait_id = BindingsSupport::Get()->AsyncWait(
-      handle, flags, waiting_callback.get());
+      handle, flags, waiting_callback.Get());
 
   waiting_callback->set_wait_id(wait_id);
 
-  return waiting_callback.get();
+  return waiting_callback.Get();
 }
 
 void CancelWait(WaitingCallback* waiting_callback) {