Ship RegExp subclassing

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index a7fc25ef1ccc31540c2faaa96c26fdb5bda4b387..1037b95f266ff32e55e66c3476f7afd5b9ab2937 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -217,8 +217,7 @@ DEFINE_IMPLICATION(es_staging, move_object_start)
 // Features that are complete (but still behind --harmony/es-staging flag).
 #define HARMONY_STAGED(V)                                   \
   V(harmony_regexp_lookbehind, "harmony regexp lookbehind") \
-  V(harmony_unicode_regexps, "harmony unicode regexps")     \
-  V(harmony_regexp_subclass, "harmony regexp subclassing")
+  V(harmony_unicode_regexps, "harmony unicode regexps")
 
 // Features that are shipping (turned on by default, but internal flag remains).
 #define HARMONY_SHIPPING(V)                                               \
@@ -235,8 +234,8 @@ DEFINE_IMPLICATION(es_staging, move_object_start)
   V(harmony_sloppy_let, "harmony let in sloppy mode")                     \
   V(harmony_sloppy_function, "harmony sloppy function block scoping")     \
   V(harmony_proxies, "harmony proxies")                                   \
-  V(harmony_reflect, "harmony Reflect API")
-
+  V(harmony_reflect, "harmony Reflect API")                               \
+  V(harmony_regexp_subclass, "harmony regexp subclassing")
 
 // Once a shipping feature has proved stable in the wild, it will be dropped
 // from HARMONY_SHIPPING, all occurrences of the FLAG_ variable are removed,