Make hasNext a getter instead of a method.

tools/test-runtime.dart

 #!/usr/bin/env 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.
 
 // TODO(ager): Get rid of this version of test.dart when we don't have
 // to worry about the special runtime checkout anymore.
 // This file is identical to test.dart with test suites in the
 // directories samples, client, compiler, and utils removed.
 
@@ skipping 50 matching lines @@
       List settings =
           ['compiler', 'runtime', 'mode', 'arch'].map((name) => conf[name]);
       if (conf['checked']) settings.add('checked');
       output_words.add(Strings.join(settings, '_'));
     }
     print(Strings.join(output_words, ' '));
   }
 
   var configurationIterator = configurations.iterator();
   void enqueueConfiguration(ProcessQueue queue) {
-    if (!configurationIterator.hasNext()) return;
+    if (!configurationIterator.hasNext) return;
 
     var conf = configurationIterator.next();
     if (selectors.containsKey('co19')) {
       queue.addTestSuite(new Co19TestSuite(conf));
     }
     if (conf['runtime'] == 'vm' && selectors.containsKey('vm')) {
       // vm tests contain both cc tests (added here) and dart tests (added in
       // [TEST_SUITE_DIRECTORIES]).
       queue.addTestSuite(new VMTestSuite(conf));
     }
@@ skipping 16 matching lines @@
   new ProcessQueue(
       maxProcesses,
       progressIndicator,
       startTime,
       printTiming,
       enqueueConfiguration,
       () => terminateHttpServer(),
       verbose,
       listTests);
 }