Patch from https://bugzilla.mozilla.org/show_bug.cgi?id=1426865

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Upstream-Status: Submitted [https://bugzilla.mozilla.org/show_bug.cgi?id=1426865]
--- a/js/public/TypeDecls.h
+++ b/js/public/TypeDecls.h
@@ -21,22 +21,23 @@
 #include <stdint.h>
 
 #include "js-config.h"
+#include "jstypes.h"
 
 struct JSContext;
-class JSFunction;
+class JS_PUBLIC_API(JSFunction);
 class JSObject;
-class JSScript;
-class JSString;
-class JSAddonId;
+class JS_PUBLIC_API(JSScript);
+class JS_PUBLIC_API(JSString);
+class JS_PUBLIC_API(JSAddonId);
 
-struct jsid;
+struct JS_PUBLIC_API(jsid);
 
 namespace JS {
 
 typedef unsigned char Latin1Char;
 
-class Symbol;
-class Value;
+class JS_PUBLIC_API(Symbol);
+class JS_PUBLIC_API(Value);
 template <typename T> class Handle;
 template <typename T> class MutableHandle;
 template <typename T> class Rooted;