Ship fractionalSecondDigits option to Intl.DateTimeFormatShip

I2S https://groups.google.com/a/chromium.org/forum/#!searchin/blink-dev/fractionalSecondDigits%7Csort:date/blink-dev/ISa0b6fOefY/pBlgkvZhBAAJ
I2P https://groups.google.com/a/chromium.org/forum/#!searchin/blink-dev/Intent$20to$20Implement$3A$20Add$20millisecondDigits$20option$20to$20Intl.DateTimeFormat%7Csort:date/blink-dev/WXd9nh03a1M/z7QeIMgrBgAJ
Chrome Status: https://www.chromestatus.com/feature/5704965743968256

Latest spec: https://github.com/tc39/ecma402/pull/347
LGTMs: bratell.d@gmail.com / chrishtr@chromium.org / mkwst@chromium.org

Bug: v8:9284
Change-Id: I4d2cca515ce65d41b38ebdef00b429fa873ea624
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2116989
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67381}

src/flags/flag-definitions.h

@@ -239,8 +239,6 @@ DEFINE_IMPLICATION(harmony_weak_refs_with_cleanup_some, harmony_weak_refs)
   HARMONY_STAGED_BASE(V)                                   \
   V(harmony_intl_dateformat_day_period,                    \
     "Add dayPeriod option to DateTimeFormat")              \
-  V(harmony_intl_dateformat_fractional_second_digits,      \
-    "Add fractionalSecondDigits option to DateTimeFormat") \
   V(harmony_intl_segmenter, "Intl.Segmenter")
 #else
 #define HARMONY_STAGED(V) HARMONY_STAGED_BASE(V)
@@ -258,8 +256,10 @@ DEFINE_IMPLICATION(harmony_weak_refs_with_cleanup_some, harmony_weak_refs)
   V(harmony_weak_refs, "harmony weak references")
 
 #ifdef V8_INTL_SUPPORT
-#define HARMONY_SHIPPING(V) \
-  HARMONY_SHIPPING_BASE(V)  \
+#define HARMONY_SHIPPING(V)                                \
+  HARMONY_SHIPPING_BASE(V)                                 \
+  V(harmony_intl_dateformat_fractional_second_digits,      \
+    "Add fractionalSecondDigits option to DateTimeFormat") \
   V(harmony_intl_displaynames, "Intl.DisplayNames")
 #else
 #define HARMONY_SHIPPING(V) HARMONY_SHIPPING_BASE(V)

test/intl/date-format/property-override.js

@@ -71,6 +71,7 @@ var expectedProperties = [
   'minute',
   'second',
   'timeZoneName',
+  'fractionalSecondDigits',
 ];
 
 assertEquals(expectedProperties.length, properties.length);

test/test262/test262.status

@@ -62,6 +62,10 @@
   # https://bugs.chromium.org/p/v8/issues/detail?id=4709
   'language/expressions/assignment/fn-name-lhs-cover': [FAIL],
 
+  # https://github.com/tc39/test262/issues/2591
+  'intl402/DateTimeFormat/prototype/resolvedOptions/order': ['--no-harmony-intl_dateformat_fractional_second_digits'],
+  'intl402/DateTimeFormat/prototype/resolvedOptions/order-dayPeriod': ['--no-harmony-intl_dateformat_fractional_second_digits'],
+
   # https://bugs.chromium.org/p/v8/issues/detail?id=9084
   'intl402/supportedLocalesOf-consistent-with-resolvedOptions': [FAIL],
   'intl402/fallback-locales-are-supported': [FAIL],