Add more subtype checks, and repeat them so that any inlined checks can be tested as well (first te…

tests/language/src/Instanceof3Test.dart

 // Copyright (c) 2012, 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.
 // Dart test program for testing the instanceof operation.
 
 // In the type test 'e is T', it is a run-time error if T does not denote a type
 // available in the current lexical scope.
 
 isCheckedMode() {
   try {
     var i = 1;
     String s = i;
     return false;
   } catch(var e) {
     return true;
   }
 }
 
-main() {
+testAll() {
   {
     bool got_type_error = false;
     var x = null;
     try {
       Expect.isFalse(x is UndeclaredType);  // x is null.
     } catch (TypeError error) {
       got_type_error = true;
     }
     // Type error in production mode and in checked mode.
     Expect.isTrue(got_type_error);
@@ skipping 47 matching lines @@
     var x = new List<int>();
     try {
       Expect.isTrue(x is List<UndeclaredType>);  // x is a List<int>.
     } catch (TypeError error) {
       got_type_error = true;
     }
     // Type error in checked mode only.
     Expect.isTrue(got_type_error == isCheckedMode());
   }
 }
+
+main() {
+  // Repeat type checks so that inlined tests can be tested as well.
+  for (int i = 0; i < 5; i++) {
+    testAll();
+  }
+}