[gin] Introduce Wrappable::GetObjectTemplate

mojo/apps/js/bindings/support.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/apps/js/bindings/support.h"
 
 #include "base/bind.h"
 #include "gin/arguments.h"
 #include "gin/converter.h"
 #include "gin/function_template.h"
@@ skipping 36 matching lines @@
 }  // namespace
 
 const char Support::kModuleName[] = "mojo/apps/js/bindings/support";
 
 v8::Local<v8::ObjectTemplate> Support::GetTemplate(v8::Isolate* isolate) {
   gin::PerIsolateData* data = gin::PerIsolateData::From(isolate);
   v8::Local<v8::ObjectTemplate> templ = data->GetObjectTemplate(
       &g_wrapper_info);
 
   if (templ.IsEmpty()) {
-    WaitingCallback::EnsureRegistered(isolate);
-
-     templ = gin::ObjectTemplateBuilder(isolate)
-        .SetMethod("asyncWait", AsyncWait)
-        .SetMethod("cancelWait", CancelWait)
-        .Build();
+    templ = gin::ObjectTemplateBuilder(isolate)
+                .SetMethod("asyncWait", AsyncWait)
+                .SetMethod("cancelWait", CancelWait)
+                .Build();
 
     data->SetObjectTemplate(&g_wrapper_info, templ);
   }
 
   return templ;
 }
 
 }  // namespace js
 }  // namespace mojo