Synchronize with r15594.

test/intl/break-iterator/wellformed-unsupported-locale.js

Index: test/intl/break-iterator/wellformed-unsupported-locale.js
diff --git a/test/mjsunit/regress/regress-crbug-217858.js b/test/intl/break-iterator/wellformed-unsupported-locale.js
similarity index 89%
copy from test/mjsunit/regress/regress-crbug-217858.js
copy to test/intl/break-iterator/wellformed-unsupported-locale.js
index e61cb9f6d24a6dcb54a81699183d2db843d0d2dc..56457b4829239944eeca79e8cee0de9498df1c5f 100644
--- a/test/mjsunit/regress/regress-crbug-217858.js
+++ b/test/intl/break-iterator/wellformed-unsupported-locale.js
@@ -25,13 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --noanalyze_environment_liveness
+// Passing a well formed but unsupported locale falls back to default.
 
-var r = /r/;
-function f() {
-  r[r] = function() {};
-}
+var iterator = Intl.v8BreakIterator(['xx']);
 
-for (var i = 0; i < 300000; i++) {
-  f();
-}
+assertEquals(iterator.resolvedOptions().locale, getDefaultLocale());