Synchronize with r15594.

test/intl/date-format/resolved-options-is-method.js

Index: test/intl/date-format/resolved-options-is-method.js
diff --git a/test/mjsunit/regress/regress-237617.js b/test/intl/date-format/resolved-options-is-method.js
similarity index 84%
copy from test/mjsunit/regress/regress-237617.js
copy to test/intl/date-format/resolved-options-is-method.js
index dabf828ae8bbfa3223e56664a97780098e6c5e3e..0c44778384b0b852fab9a60a90e1686032ca8883 100644
--- a/test/mjsunit/regress/regress-237617.js
+++ b/test/intl/date-format/resolved-options-is-method.js
@@ -25,19 +25,16 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-"use strict"
+// Test that resolvedOptions is a method, not a property getter and that
+// the result is mutable.
 
-function f() {
-  throw new Error("test stack");
-}
+var dtf = new Intl.DateTimeFormat();
 
-var error_stack = "";
-try {
-  f.call(null);
-} catch (e) {
-  error_stack = e.stack;
-}
+var result = dtf.resolvedOptions();
 
-assertTrue(error_stack.indexOf("test stack") > 0);
-assertTrue(error_stack.indexOf("illegal") < 0);
+assertTrue(result instanceof Object);
 
+// Result should be mutable.
+result.locale = 'xx';
+
+assertEquals(result.locale, 'xx');