Implement gin::ObjectTemplateBuilder

gin/function_template.h.pump

 $$ This is a pump file for generating file templates.  Pump is a python
 $$ script that is part of the Google Test suite of utilities.  Description
 $$ can be found here:
 $$
 $$ http://code.google.com/p/googletest/wiki/PumpManual
 $$
 
+#ifndef GIN_FUNCTION_TEMPLATE_H_
+#define GIN_FUNCTION_TEMPLATE_H_
+
 $var MAX_ARITY = 4
 
 // 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 "base/callback.h"
 #include "base/logging.h"
 #include "gin/arguments.h"
 #include "gin/converter.h"
@@ skipping 155 matching lines @@
   typedef internal::CallbackHolder<R($for ARG , [[P$(ARG)]])> HolderT;
   scoped_refptr<HolderT> holder(new HolderT(callback));
   return v8::FunctionTemplate::New(
       &internal::DispatchToCallback<R$for ARG [[, P$(ARG)]]>,
       ConvertToV8<internal::CallbackHolderBase*>(isolate, holder.get()));
 }
 
 ]]
 
 }  // namespace gin
+
+#endif  // GIN_FUNCTION_TEMPLATE_H_