Add a new variable environment for testing, to replace the misusage of 'arch'.

dart/compiler/tests/dartc/testcfg.py

 #!/usr/bin/env python
 # 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.
 
 import os
 from os.path import join, exists
 import re
 
 import test
@@ skipping 48 matching lines @@
             'org.junit.runner.JUnitCore'] + self.classnames
 
   def GetName(self):
     return self.path[-1]
 
 
 class JUnitTestConfiguration(test.TestConfiguration):
   def __init__(self, context, root):
     super(JUnitTestConfiguration, self).__init__(context, root)
 
-  def ListTests(self, current_path, path, mode, arch):
+  def ListTests(self, current_path, path, mode, arch, component):
     test_path = current_path + ['junit_tests']
     if not self.Contains(path, test_path):
       return []
     classes = []
     javatests_path = join(join(join(self.root, '..'), '..'), 'javatests')
     javatests_path = os.path.normpath(javatests_path)
     for root, dirs, files in os.walk(javatests_path):
       if root.endswith('com/google/dart/compiler/vm'):
         continue
       for f in [x for x in files if self.IsTest(x)]:
@@ skipping 10 matching lines @@
     return name.endswith('Tests.java')
 
   def GetTestStatus(self, sections, defs):
     status = join(self.root, 'dartc.status')
     if exists(status):
       test.ReadConfigurationInto(status, sections, defs)
 
 
 def GetConfiguration(context, root):
   return JUnitTestConfiguration(context, root)