Fix safari browser to use Future.value

tools/testing/dart/test_progress.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 test_progress;
 
 import "dart:io";
 import "dart:io" as io;
 import "http_server.dart" as http_server;
 import "status_file_parser.dart";
@@ skipping 325 matching lines @@
         onDone: () {
           if (count > MIN_NUMBER_OF_TEMP_DIRS) {
             DebugLogger.warning("There are ${count} directories "
                                 "in the system tempdir ('$systemTempDir')! "
                                 "Maybe left over directories?\n");
       }
     });
   }
 }
 
-class LineProgressIndicator extends EventListener implements ProgressIndicator {
+class LineProgressIndicator extends EventListener {
   void done(TestCase test) {
     var status = 'pass';
     if (test.lastCommandOutput.unexpectedOutput) {
       status = 'fail';
     }
     print('Done ${test.configurationString} ${test.displayName}: $status');
   }
 }
 
 class TestFailurePrinter extends EventListener {
@@ skipping 31 matching lines @@
 
         print(_buildSummaryEnd(_failedTests));
       }
     }
   }
 }
 
 class ProgressIndicator extends EventListener {
   ProgressIndicator(this._startTime);
 
-  factory ProgressIndicator.fromName(String name,
-                                     DateTime startTime,
-                                     Formatter formatter) {
-    switch (name) {
-      case 'compact':
-        return new CompactProgressIndicator(startTime, formatter);
-      case 'line':
-        return new LineProgressIndicator();
-      case 'verbose':
-        return new VerboseProgressIndicator(startTime);
-      case 'status':
-        return new ProgressIndicator(startTime);
-      case 'buildbot':
-        return new BuildbotProgressIndicator(startTime);
-      default:
-        assert(false);
-        break;
-    }
-  }
 
   void testAdded() { _foundTests++; }
 
   void start(TestCase test) {
     _printStartProgress(test);
   }
 
   void done(TestCase test) {
     if (test.lastCommandOutput.unexpectedOutput) {
       _failedTests++;
@@ skipping 108 matching lines @@
         print('@@@BUILD_STEP $stepName failures@@@');
       }
       for (String line in _failureSummary) {
         print(line);
       }
       print('');
     }
     print(_buildSummaryEnd(_failedTests));
   }
 }
+
+
+EventListener progressIndicatorFromName(String name,
+                                        DateTime startTime,
+                                        Formatter formatter) {
+  switch (name) {
+    case 'compact':
+      return new CompactProgressIndicator(startTime, formatter);
+    case 'line':
+      return new LineProgressIndicator();
+    case 'verbose':
+      return new VerboseProgressIndicator(startTime);
+    case 'status':
+      return new ProgressIndicator(startTime);
+    case 'buildbot':
+      return new BuildbotProgressIndicator(startTime);
+    default:
+      assert(false);
+      break;
+  }
+}