Add suite name to display name. This makes it easier to find failing tests.

tools/testing/dart/test_suite.dart

 // Copyright (c) 2011, 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_suite");
 
 #import("status_file_parser.dart");
 #import("test_runner.dart");
 #import("multitest.dart");
 
@@ skipping 70 matching lines @@
           SummaryReport.add(expectations);
       }
 
       if (expectations.contains(SKIP)) return;
 
       // The cc test runner takes options after the name of the test
       // to run.
       var args = [testName];
       args.addAll(TestUtils.standardOptions(configuration));
 
-      doTest(new TestCase(testName,
+      doTest(new TestCase('$suiteName/$testName',
                           runnerPath,
                           args,
                           configuration,
                           completeHandler,
                           expectations));
 
       receiveTestName.receive(testNameHandler);
     }
   }
 
@@ skipping 108 matching lines @@
         }
       }
       if (expectations.contains(SKIP)) return;
 
       isNegative = isNegative ||
           (configuration['checked'] && isNegativeIfChecked);
       var argumentLists = argumentListsFromFile(filename,
                                                 optionsFromFile,
                                                 enableFatalTypeErrors);
       for (var args in argumentLists) {
-        doTest(new TestCase(testName,
+        doTest(new TestCase('$suiteName/$testName',
                             shellPath(),
                             args,
                             configuration,
                             completeHandler,
                             expectations,
                             isNegative));
       }
     };
   }
 
@@ skipping 311 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);
   }
 }