Add catchless catch clauses

tests/language/try_catch_test.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class MyException { }
 
 class MyException1 extends MyException { }
 
 class MyException2 extends MyException { }
 
@@ skipping 105 matching lines @@
     var caught = false;
     try {
       throw new MyException();
     } catch (exc) {
       caught = true;
     }
     Expect.equals(true, caught);
     Expect.equals(3, e);
   }
 
+  static void test9() {
+    var e = 6;
+    try {
+      throw "up";
+    } on String {
+      e = "s";
+    } on int {
+      e = "i";
+    }
+    Expect.equals("s", e);
+  }
+
   static void testMain() {
     test1();
     test2();
     test3();
     test4();
     test5();
     test6();
     test7();
     test8();
+    test9();
   }
 }
 
 main() {
   TryCatchTest.testMain();
 }