Outputing comma-separated report with percentages

tools/testing/dart/test_configurations.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.
 
 library test_configurations;
 
 import "dart:async";
 import 'dart:io';
 import "dart:math" as math;
 
@@ skipping 44 matching lines @@
   var maxProcesses = firstConf['tasks'];
   var progressIndicator = firstConf['progress'];
   // TODO(kustermann): Remove this option once the buildbots don't use it
   // anymore.
   var failureSummary = firstConf['failure-summary'];
   BuildbotProgressIndicator.stepName = firstConf['step_name'];
   var verbose = firstConf['verbose'];
   var printTiming = firstConf['time'];
   var listTests = firstConf['list'];
 
+  var reportInJson = firstConf['report_in_json'];
+
   var recordingPath = firstConf['record_to_file'];
   var recordingOutputPath = firstConf['replay_from_file'];
 
   Browser.deleteCache = firstConf['clear_browser_cache'];
 
   if (recordingPath != null && recordingOutputPath != null) {
     print("Fatal: Can't have the '--record_to_file' and '--replay_from_file'"
           "at the same time. Exiting ...");
     exit(1);
   }
@@ skipping 184 matching lines @@
   if (firstConf['write_test_outcome_log']) {
     eventListener.add(new TestOutcomeLogWriter());
   }
   if (firstConf['copy_coredumps']) {
     eventListener.add(new UnexpectedCrashDumpArchiver());
   }
 
   // The only progress indicator when listing tests should be the
   // the summary printer.
   if (listTests) {
-    eventListener.add(new SummaryPrinter());
+    eventListener.add(new SummaryPrinter(jsonOnly: reportInJson));
   } else {
     eventListener.add(new ExitCodeSetter());
   }
 
   void startProcessQueue() {
     // [firstConf] is needed here, since the ProcessQueue needs to know the
     // settings of 'noBatch' and 'local_ip'
     new ProcessQueue(firstConf,
                      maxProcesses,
                      maxBrowserProcesses,
                      startTime,
                      testSuites,
                      eventListener,
                      allTestsFinished,
                      verbose,
                      recordingPath,
                      recordingOutputPath);
   }
 
   // Start all the HTTP servers required before starting the process queue.
   if (serverFutures.isEmpty) {
     startProcessQueue();
   } else {
     Future.wait(serverFutures).then((_) => startProcessQueue());
   }
 }