Add a --cps-ir flag to the testing script to allow us to run with the new cps based backend in dart…

tools/testing/dart/test_options.dart

 // Copyright (c) 2013, 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_options_parser;
 
 import "dart:io";
 import "drt_updater.dart";
 import "test_suite.dart";
 import "path.dart";
@@ skipping 129 matching lines @@
               false,
               type: 'bool'),
           new _TestOptionSpecification(
               'csp',
               'Run tests under Content Security Policy restrictions',
               ['--csp'],
               [],
               false,
               type: 'bool'),
           new _TestOptionSpecification(
+              'cps_ir',
+              'Run the compiler with the cps based backend',
+              ['--cps-ir'],
+              [],
+              false,
+              type: 'bool'),
+          new _TestOptionSpecification(
               'timeout',
               'Timeout in seconds',
               ['-t', '--timeout'],
               [],
               -1,
               type: 'int'),
           new _TestOptionSpecification(
               'progress',
               'Progress indication mode',
               ['-p', '--progress'],
@@ skipping 730 matching lines @@
         return option;
       }
     }
     print('Unknown test option $name');
     exit(1);
   }
 
 
   List<_TestOptionSpecification> _options;
 }