Create a URI class in utils/ (based on client/util/).

dart/tools/testing/dart/test_runner.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
 #library("test_runner");
 
 #import("dart:io");
 #import("status_file_parser.dart");
 #import("test_progress.dart");
 #import("test_suite.dart");
 
@@ skipping 58 matching lines @@
       var suffixSplit = suffix.split(' ');
       suffixSplit.forEach((e) {
         if (!e.isEmpty()) newArguments.add(e);
       });
       arguments = newArguments;
     }
   }
 
   int get timeout() => configuration['timeout'];
 
-  String get configurationString() =>
-      "${configuration['mode']}_${configuration['arch']}";
+  String get configurationString() {
+    final component = configuration['component'];
+    final mode = configuration['mode'];
+    final arch = configuration['arch'];
+    return "$component ${mode}_$arch";
+  }
 
   void completed() { completedHandler(this); }
 }
 
 
 /**
  * BrowserTestCase has an extra compilation command that is run by
  * RunningProcess.start(), and it checks conditions on the test output
  * in TestOutput.didFail().
  */
@@ skipping 458 matching lines @@
           test.displayName != 'dartc/junit_tests') {
         _ensureDartcBatchRunnersStarted(test.executablePath);
         _getDartcBatchRunnerProcess().startTest(test);
       } else {
         new RunningProcess(test).start();
       }
       _numProcesses++;
     }
   }
 }