Updated to latest WebKit changes and removed usage of obsolete environment variable

tools/dartium/test.py

 #!/usr/bin/env python
 #
 # Copyright 2011 Google Inc. All Rights Reserved.
 
 import fnmatch
 import optparse
 import os
 import re
 import shutil
 import subprocess
@@ skipping 176 matching lines @@
         if ('layout' in suites and
             'layout' in TEST_INFO[component] and
             checkmode in TEST_INFO[component]['layout']):
           # Run layout tests in this mode
           dart_flags = ' '.join(TEST_INFO[component]['layout'][checkmode])
 
           if options.layout_test:
             test = os.path.join(DART_TEST_DIR, options.layout_test)
           else:
             test = DART_TEST_DIR
-          package_root = os.path.join(build_dir, 'packages')
           utils.runCommand(['python',
                             test_script,
                             test_mode,
                             show_results,
                             '--time-out-ms', str(timeout),
                             # Temporary hack to fix issue with svn vs. svn.bat.
                             '--builder-name', 'BuildBot',
                             '--additional-env-var',
                             'DART_FLAGS=%s' % dart_flags,
-                            '--additional-env-var',
-                            'DART_PACKAGE_ROOT=file://%s' % package_root,
                             test])
 
         # Run core dart tests
         if ('core' in suites and
             'core' in TEST_INFO[component] and
             checkmode in TEST_INFO[component]['core']):
           core_flags = TEST_INFO[component]['core'][checkmode]
           core_flags = map(lambda flag: flag % executable_map, core_flags)
           if options.buildbot:
             core_flags = ['--progress=buildbot'] + core_flags
           tester = os.path.join(srcpath, 'dart', 'tools', 'test.py')
           test_filter = [options.test_filter] if options.test_filter else []
           utils.runCommand(['python', tester] + core_flags + test_filter)
       except (StandardError, Exception) as e:
         print 'Fail: '  + str(e)
         errors = True
 
   if errors:
     return 1
   else:
     return 0
 
 if __name__ == '__main__':
   try:
     sys.exit(main())
   except StandardError as e:
     print 'Fail: ' + str(e)
     sys.exit(1)