Add a variant on ConsoleReporter that doesn't import dart:io.

lib/unittest.dart

 // Copyright (c) 2013, 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.
 
 library unittest;
 
 import 'dart:async';
 
 import 'package:path/path.dart' as p;
 
 import 'src/backend/declarer.dart';
 import 'src/backend/invoker.dart';
 import 'src/backend/suite.dart';
 import 'src/deprecated/configuration.dart';
 import 'src/deprecated/test_case.dart';
-import 'src/runner/console_reporter.dart';
+import 'src/runner/reporter/no_io_compact.dart';
 
 export 'package:matcher/matcher.dart';
 
 export 'src/deprecated/configuration.dart';
 export 'src/deprecated/simple_configuration.dart';
 export 'src/deprecated/test_case.dart';
 export 'src/frontend/expect.dart';
 export 'src/frontend/expect_async.dart';
 export 'src/frontend/future_matchers.dart';
 export 'src/frontend/prints_matcher.dart';
@@ skipping 15 matching lines @@
   if (declarer != null) return declarer;
   if (_globalDeclarer != null) return _globalDeclarer;
 
   // Since there's no Zone-scoped declarer, the test file is being run directly.
   // In order to run the tests, we set up our own Declarer via
   // [_globalDeclarer], and schedule a microtask to run the tests once they're
   // finished being defined.
   _globalDeclarer = new Declarer();
   scheduleMicrotask(() {
     var suite = new Suite(p.prettyUri(Uri.base), _globalDeclarer.tests);
-    // TODO(nweiz): Use a reporter that doesn't import dart:io here.
     // TODO(nweiz): Set the exit code on the VM when issue 6943 is fixed.
-    new ConsoleReporter([suite]).run();
+    new NoIoCompactReporter([suite], color: true).run();
   });
   return _globalDeclarer;
 }
 
 // TODO(nweiz): This and other top-level functions should throw exceptions if
 // they're called after the declarer has finished declaring.
 void test(String description, body()) => _declarer.test(description, body);
 
 void group(String description, void body()) =>
     _declarer.group(description, body);
@@ skipping 77 matching lines @@
 void setSoloTest(int id) {}
 
 @deprecated
 void enableTest(int id) {}
 
 @deprecated
 void disableTest(int id) {}
 
 @deprecated
 withTestEnvironment(callback()) => callback();