Remove the global Strength enum class completely.

src/js/v8natives.js

Index: src/js/v8natives.js
diff --git a/src/js/v8natives.js b/src/js/v8natives.js
index f99564e8410bc6480be4fa2ff458463ea644c269..2dda1a3b27e879d5aa75b34f13110811d9b3d692 100644
--- a/src/js/v8natives.js
+++ b/src/js/v8natives.js
@@ -573,11 +573,9 @@ function DefineObjectProperty(obj, p, desc, should_throw) {
         if (IsDataDescriptor(current) && IsDataDescriptor(desc)) {
           var currentIsWritable = current.isWritable();
           if (currentIsWritable != desc.isWritable()) {
-            if (!currentIsWritable || IS_STRONG(obj)) {
+            if (!currentIsWritable) {
               if (should_throw) {
-                throw currentIsWritable
-                    ? MakeTypeError(kStrongRedefineDisallowed, obj, p)
-                    : MakeTypeError(kRedefineDisallowed, p);
+                throw MakeTypeError(kRedefineDisallowed, p);
               } else {
                 return false;
               }