Add a gin/public directory

gin/public/wrapper_info.h

Index: gin/public/wrapper_info.h
diff --git a/gin/wrapper_info.h b/gin/public/wrapper_info.h
similarity index 81%
rename from gin/wrapper_info.h
rename to gin/public/wrapper_info.h
index 16eef25536658c6efdba6ec7f592b4f876f25e9c..f1c554ee5de857be19e99976d25e9eafb992cd1e 100644
--- a/gin/wrapper_info.h
+++ b/gin/public/wrapper_info.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef GIN_WRAPPER_INFO_H_
-#define GIN_WRAPPER_INFO_H_
+#ifndef GIN_PUBLIC_WRAPPER_INFO_H_
+#define GIN_PUBLIC_WRAPPER_INFO_H_
 
 #include "v8/include/v8.h"
 
@@ -22,4 +22,4 @@ struct WrapperInfo {
 
 }  // namespace gin
 
-#endif  // GIN_WRAPPER_INFO_H_
+#endif  // GIN_PUBLIC_WRAPPER_INFO_H_