Refactoring of ProgressIndicator

tools/test.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.
 
 /**
  * This file is the entrypoint of the dart test suite.  This suite is used
  * to test:
  *
  *     1. the dart vm
@@ skipping 145 matching lines @@
             serverList: TestingServerRunner.serverList));
       }
     }
   }
 
   void allTestsFinished() {
     TestingServerRunner.terminateHttpServers();
     DebugLogger.close();
   }
 
+  var eventListener = [];
+  if (progressIndicator != 'silent') {
+    eventListener.add(new SummaryPrinter());
+    if (printTiming) {
+      eventListener.add(new TimingPrinter(startTime));
+    }
+    eventListener.add(new ProgressIndicator.fromName(progressIndicator,
+                                                     startTime));
+  }
+  eventListener.add(new ExitCodeSetter());
+
   // Start process queue.
   new ProcessQueue(maxProcesses,
                    maxBrowserProcesses,
-                   progressIndicator,
                    startTime,
-                   printTiming,
                    testSuites,
+                   eventListener,
                    allTestsFinished,
                    verbose,
                    listTests);
 }