Stage Array grouping

Bug: v8:12499
Change-Id: I41961dc689ff634fa141c8b15909ca57bdb401cd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3482479
Auto-Submit: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79266}

src/flags/flag-definitions.h

@@ -308,7 +308,6 @@ DEFINE_BOOL(harmony_shipping, true, "enable all shipped harmony features")
     "harmony ResizableArrayBuffer / GrowableSharedArrayBuffer")                \
   V(harmony_temporal, "Temporal")                                              \
   V(harmony_shadow_realm, "harmony ShadowRealm")                               \
-  V(harmony_array_grouping, "harmony array grouping")                          \
   V(harmony_struct, "harmony structs and shared structs")
 
 #ifdef V8_INTL_SUPPORT
@@ -320,7 +319,8 @@ DEFINE_BOOL(harmony_shipping, true, "enable all shipped harmony features")
 #endif
 
 // Features that are complete (but still behind --harmony/es-staging flag).
-#define HARMONY_STAGED_BASE(V)
+#define HARMONY_STAGED_BASE(V) \
+  V(harmony_array_grouping, "harmony array grouping")
 
 #ifdef V8_INTL_SUPPORT
 #define HARMONY_STAGED(V) \