Make the repeating argument to timers optional.

tools/testing/dart/test_runner.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_runner");
 
 #import("status_file_parser.dart");
 #import("test_progress.dart");
 #import("test_suite.dart");
 
@@ skipping 218 matching lines @@
     startTime = new Date.now();
     process.start();
     InputStream stdoutStream = process.stdout;
     InputStream stderrStream = process.stderr;
     StringInputStream stdoutStringStream = new StringInputStream(stdoutStream);
     StringInputStream stderrStringStream = new StringInputStream(stderrStream);
     stdoutStringStream.lineHandler =
         makeReadHandler(stdoutStringStream, stdout);
     stderrStringStream.lineHandler =
         makeReadHandler(stderrStringStream, stderr);
-    timeoutTimer = new Timer(timeoutHandler, 1000 * testCase.timeout, false);
+    timeoutTimer = new Timer(timeoutHandler, 1000 * testCase.timeout);
   }
 
   void timeoutHandler(Timer unusedTimer) {
     timedOut = true;
     process.kill();
   }
 }
 
 
 class DartcBatchRunnerProcess {
@@ skipping 37 matching lines @@
     };
     _process.kill();
   }
 
   void doStartTest(TestCase testCase) {
     _startTime = new Date.now();
     _testStdout = new List<String>();
     _testStderr = new List<String>();
     _stdoutStream.lineHandler = _readOutput(_stdoutStream, _testStdout);
     _stderrStream.lineHandler = _readOutput(_stderrStream, _testStderr);
-    _timer = new Timer(_timeoutHandler(testCase),
-                       testCase.timeout * 1000,
-                       false);
+    _timer = new Timer(_timeoutHandler(testCase), testCase.timeout * 1000);
     _process.stdin.write(_createArgumentsLine(testCase.arguments).charCodes());
   }
 
   String _createArgumentsLine(List<String> arguments) {
     return Strings.join(arguments, ' ') + '\n';
   }
 
   int _reportResult(String output) {
     var test = _currentTest;
     _currentTest = null;
@@ skipping 162 matching lines @@
       if (test.configuration['component'] == 'dartc') {
         _ensureDartcBatchRunnersStarted(test.executablePath);
         _getDartcBatchRunnerProcess().startTest(test);
       } else {
         new RunningProcess(test).start();
       }
       _numProcesses++;
     }
   }
 }