Add param_after_rest error message after r26362

src/messages.js

Index: src/messages.js
diff --git a/src/messages.js b/src/messages.js
index 0a9a01ebbc607ab6a76d5f8f1df3b94b9461fc16..3b61e1882db5bfa0a80dcd720c8b3670d584b817 100644
--- a/src/messages.js
+++ b/src/messages.js
@@ -180,7 +180,8 @@ var kMessages = {
   duplicate_constructor:         ["A class may only have one constructor"],
   sloppy_lexical:                ["Block-scoped declarations (let, const, function, class) not yet supported outside strict mode"],
   super_constructor_call:        ["A 'super' constructor call may only appear as the first statement of a function, and its arguments may not access 'this'. Other forms are not yet supported."],
-  duplicate_proto:               ["Duplicate __proto__ fields are not allowed in object literals"]
+  duplicate_proto:               ["Duplicate __proto__ fields are not allowed in object literals"],
+  param_after_rest:              ["Rest parameter must be last formal parameter"]
 };