[gin] Introduce Wrappable::GetObjectTemplate

mojo/apps/js/bindings/gl/module.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/gl/module.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 
 #include "base/logging.h"
@@ skipping 21 matching lines @@
 }  // namespace
 
 v8::Local<v8::ObjectTemplate> GetModuleTemplate(v8::Isolate* isolate) {
   gin::PerIsolateData* data = gin::PerIsolateData::From(isolate);
   v8::Local<v8::ObjectTemplate> templ = data->GetObjectTemplate(&kWrapperInfo);
 
   if (templ.IsEmpty()) {
     templ = gin::ObjectTemplateBuilder(isolate)
         .SetMethod("Context", CreateContext)
         .Build();
-    templ->SetInternalFieldCount(gin::kNumberOfInternalFields);
     data->SetObjectTemplate(&kWrapperInfo, templ);
   }
 
-  Context::GetObjectTemplate(isolate);
-  Opaque::GetObjectTemplate(isolate);
-
   return templ;
 }
 
 }  // namespace gl
 }  // namespace js
 }  // namespace mojo