Fix dartc part of test scripts.

tools/testing/dart/test_suite.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.
 
 /**
  * Classes and methods for enumerating and preparing tests.
  *
  * This library includes:
  *
  * - Creating tests by listing all the Dart files in certain directories,
@@ skipping 1030 matching lines @@
   }
 
   void processDirectory() {
     directoryPath = '$dartDir/$directoryPath';
     // Enqueueing the directory listers is an activity.
     activityStarted();
     for (String testDir in _testDirs) {
       Directory dir = new Directory("$directoryPath/$testDir");
       if (dir.existsSync()) {
         activityStarted();
-        dir.onError = (s) {
-          throw s;
-        };
         var lister = dir.list(recursive: listRecursively());
         lister.onFile = processFile;
         lister.onDone = (ignore) => activityCompleted();
       }
     }
     // Completed the enqueueing of listers.
     activityCompleted();
   }
 }
 
@@ skipping 44 matching lines @@
     testClasses = <String>[];
     // Do not read the status file.
     // All exclusions are hardcoded in this script, as they are in testcfg.py.
     processDirectory();
   }
 
   void processDirectory() {
     directoryPath = '$dartDir/$directoryPath';
     Directory dir = new Directory(directoryPath);
 
-    dir.onError = (s) {
-      throw s;
-    };
     var lister = dir.list(recursive: true);
     lister.onFile = processFile;
     lister.onDone = createTest;
   }
 
   void processFile(String filename) {
     if (!isTestFile(filename)) return;
 
     int index = filename.indexOf('compiler/javatests/com/google/dart');
     if (index != -1) {
@@ skipping 268 matching lines @@
  * $noCrash tests are expected to be flaky but not crash
  * $pass tests are expected to pass
  * $failOk tests are expected to fail that we won't fix
  * $fail tests are expected to fail that we should fix
  * $crash tests are expected to crash that we should fix
  * $timeout tests are allowed to timeout
 """;
     print(report);
    }
 }