Gin: Consolidate all the Converter<Wrappable> subclasses.

gin/function_template.h

 // This file was GENERATED by command:
 //     pump.py function_template.h.pump
 // DO NOT EDIT BY HAND!!!
 
 
 
 #ifndef GIN_FUNCTION_TEMPLATE_H_
 #define GIN_FUNCTION_TEMPLATE_H_
 
 // Copyright 2013 The Chromium Authors. All rights reserved.
@@ skipping 14 matching lines @@
 namespace gin {
 
 class PerIsolateData;
 
 enum CreateFunctionTemplateFlags {
   HolderIsFirstArgument = 1 << 0,
 };
 
 namespace internal {
 
+// TODO(aa): Move this to base/template_util.h as remove_const.
 template<typename T>
 struct CallbackParamTraits {
   typedef T LocalType;
 };
 template<typename T>
 struct CallbackParamTraits<const T&> {
   typedef T LocalType;
 };
 template<typename T>
 struct CallbackParamTraits<const T*> {
@@ skipping 281 matching lines @@
 };
 
 }  // namespace internal
 
 
 // This should be called once per-isolate to initialize the function template
 // system.
 void InitFunctionTemplates(PerIsolateData* isolate_data);
 
 
-// This has to be outside the internal namespace because template
-// specializations must be declared in the same namespace as the original
-// template.
-template<>
-struct Converter<internal::CallbackHolderBase*>
-    : public WrappableConverter<internal::CallbackHolderBase> {};
-
-
 // CreateFunctionTemplate creates a v8::FunctionTemplate that will create
 // JavaScript functions that execute a provided C++ function or base::Callback.
 // JavaScript arguments are automatically converted via gin::Converter, as is
 // the return value of the C++ function, if any.
 template<typename Sig>
 v8::Local<v8::FunctionTemplate> CreateFunctionTemplate(
     v8::Isolate* isolate, const base::Callback<Sig> callback,
     int callback_flags = 0) {
   typedef internal::CallbackHolder<Sig> HolderT;
   gin::Handle<HolderT> holder = CreateHandle(
       isolate, new HolderT(callback, callback_flags));
   return v8::FunctionTemplate::New(
       &internal::Dispatcher<Sig>::DispatchToCallback,
       ConvertToV8<internal::CallbackHolderBase*>(isolate, holder.get()));
 }
 
 }  // namespace gin
 
 #endif  // GIN_FUNCTION_TEMPLATE_H_