[Intl] Stage Intl.RelativeTimeFormat

This will give us some clusterfuzz coverage.

Bug: v8:7869
Change-Id: Ia93b4f4f8b76011a73405788ad940059467d9114
Reviewed-on: https://chromium-review.googlesource.com/1220292Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55808}

src/flag-definitions.h

@@ -215,23 +215,30 @@ DEFINE_IMPLICATION(harmony_class_fields, harmony_private_fields)
   V(harmony_await_optimization, "harmony await taking 1 tick")
 
 #ifdef V8_INTL_SUPPORT
-#define HARMONY_INPROGRESS(V)                    \
-  HARMONY_INPROGRESS_BASE(V)                     \
-  V(harmony_locale, "Intl.Locale")               \
-  V(harmony_intl_list_format, "Intl.ListFormat") \
-  V(harmony_intl_relative_time_format, "Intl.RelativeTimeFormat")
+#define HARMONY_INPROGRESS(V)      \
+  HARMONY_INPROGRESS_BASE(V)       \
+  V(harmony_locale, "Intl.Locale") \
+  V(harmony_intl_list_format, "Intl.ListFormat")
 #else
 #define HARMONY_INPROGRESS(V) HARMONY_INPROGRESS_BASE(V)
 #endif
 
 // Features that are complete (but still behind --harmony/es-staging flag).
-#define HARMONY_STAGED(V)                                                  \
+#define HARMONY_STAGED_BASE(V)                                             \
   V(harmony_public_fields, "harmony public fields in class literals")      \
   V(harmony_private_fields, "harmony private fields in class literals")    \
   V(harmony_numeric_separator, "harmony numeric separator between digits") \
   V(harmony_string_matchall, "harmony String.prototype.matchAll")          \
   V(harmony_static_fields, "harmony static fields in class literals")
 
+#ifdef V8_INTL_SUPPORT
+#define HARMONY_STAGED(V) \
+  HARMONY_STAGED_BASE(V)  \
+  V(harmony_intl_relative_time_format, "Intl.RelativeTimeFormat")
+#else
+#define HARMONY_STAGED(V) HARMONY_STAGED_BASE(V)
+#endif
+
 // Features that are shipping (turned on by default, but internal flag remains).
 #define HARMONY_SHIPPING(V)                                              \
   V(harmony_string_trimming, "harmony String.prototype.trim{Start,End}") \