LibJS: Change dateAdd to a required parameter of MoveRelativeDate

This is an editorial change in the Temporal spec.

See: https://github.com/tc39/proposal-temporal/commit/45d9079

Userland/Libraries/LibJS/Runtime/Temporal/Duration.cpp

@@ -1096,20 +1096,16 @@ ThrowCompletionOr<DurationRecord> add_duration(VM& vm, double years1, double mon
     return difference_zoned_date_time(vm, relative_to.nanoseconds(), *end_ns, time_zone, calendar, largest_unit, *Object::create(realm, nullptr));
 }
 
-// 7.5.23 MoveRelativeDate ( calendar, relativeTo, duration [ , dateAdd ] ), https://tc39.es/proposal-temporal/#sec-temporal-moverelativedate
+// 7.5.23 MoveRelativeDate ( calendar, relativeTo, duration, dateAdd ), https://tc39.es/proposal-temporal/#sec-temporal-moverelativedate
 ThrowCompletionOr<MoveRelativeDateResult> move_relative_date(VM& vm, Object& calendar, PlainDate& relative_to, Duration& duration, FunctionObject* date_add)
 {
-    // 1. If dateAdd is not present, set dateAdd to ? GetMethod(calendar, "dateAdd").
-    if (!date_add)
-        date_add = TRY(Value(&calendar).get_method(vm, vm.names.dateAdd));
-
-    // 2. Let newDate be ? CalendarDateAdd(calendar, relativeTo, duration, undefined, dateAdd)
+    // 1. Let newDate be ? CalendarDateAdd(calendar, relativeTo, duration, undefined, dateAdd)
     auto* new_date = TRY(calendar_date_add(vm, calendar, &relative_to, duration, nullptr, date_add));
 
-    // 3. Let days be DaysUntil(relativeTo, newDate).
+    // 2. Let days be DaysUntil(relativeTo, newDate).
     auto days = days_until(relative_to, *new_date);
 
-    // 4. Return the Record { [[RelativeTo]]: newDate, [[Days]]: days }.
+    // 3. Return the Record { [[RelativeTo]]: newDate, [[Days]]: days }.
     return MoveRelativeDateResult { .relative_to = make_handle(new_date), .days = days };
 }
 

Userland/Libraries/LibJS/Runtime/Temporal/Duration.h

@@ -153,7 +153,7 @@ ThrowCompletionOr<TimeDurationRecord> balance_duration(VM&, double days, double
 ThrowCompletionOr<DateDurationRecord> unbalance_duration_relative(VM&, double years, double months, double weeks, double days, String const& largest_unit, Value relative_to);
 ThrowCompletionOr<DateDurationRecord> balance_duration_relative(VM&, double years, double months, double weeks, double days, String const& largest_unit, Value relative_to);
 ThrowCompletionOr<DurationRecord> add_duration(VM&, double years1, double months1, double weeks1, double days1, double hours1, double minutes1, double seconds1, double milliseconds1, double microseconds1, double nanoseconds1, double years2, double months2, double weeks2, double days2, double hours2, double minutes2, double seconds2, double milliseconds2, double microseconds2, double nanoseconds2, Value relative_to_value);
-ThrowCompletionOr<MoveRelativeDateResult> move_relative_date(VM&, Object& calendar, PlainDate& relative_to, Duration& duration, FunctionObject* date_add = nullptr);
+ThrowCompletionOr<MoveRelativeDateResult> move_relative_date(VM&, Object& calendar, PlainDate& relative_to, Duration& duration, FunctionObject* date_add);
 ThrowCompletionOr<ZonedDateTime*> move_relative_zoned_date_time(VM&, ZonedDateTime&, double years, double months, double weeks, double days);
 ThrowCompletionOr<RoundedDuration> round_duration(VM&, double years, double months, double weeks, double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, double nanoseconds, u32 increment, StringView unit, StringView rounding_mode, Object* relative_to_object = nullptr);
 ThrowCompletionOr<DurationRecord> adjust_rounded_duration_days(VM&, double years, double months, double weeks, double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, double nanoseconds, u32 increment, StringView unit, StringView rounding_mode, Object* relative_to_object);