Gin: Add support for binding JS methods to C++ instance methods.

gin/arguments.h

Index: gin/arguments.h
diff --git a/gin/arguments.h b/gin/arguments.h
index 8be9bc399dbd8812a55690f00946dbfd8f4844ee..1461dc8690f2c5c539cacaac958ba116ccf7bc8b 100644
--- a/gin/arguments.h
+++ b/gin/arguments.h
@@ -20,8 +20,7 @@ class Arguments {
   ~Arguments();
 
   template<typename T>
-  // TODO(aa): Rename GetHolder().
-  bool Holder(T* out) {
+  bool GetHolder(T* out) {
     return ConvertFromV8(isolate_, info_->Holder(), out);
   }
 
@@ -75,9 +74,6 @@ class Arguments {
   bool insufficient_arguments_;
 };
 
-template<>
-bool Arguments::GetNext<Arguments>(Arguments* out);
-
 }  // namespace gin
 
 #endif  // GIN_ARGUMENTS_H_