Remove run_webkit_tests dependency on third_party\python_24....

webkit/tools/layout_tests/run_webkit_tests.py

 #!/usr/bin/env python
 # Copyright (c) 2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Wrapper around
    third_party/WebKit/WebKitTools/Scripts/new-run-webkit-tests"""
 import os
 import subprocess
 import sys
 
 def main():
+    if sys.platform == 'cygwin':
+        return(
+            'ERROR: you are running from cygwin python, which is not\n'
+            '       supported by "run_webkit_test.py". You should use python\n'
+            '       for Windows (2.5+) to launch this script. A python for\n'
+            '       Windows can be found at your depot_tools folder:\n'
+            '       [DEPOT_TOOLS_PATH]/python ' + '"' + sys.argv[0] + '" ' +
+            ' '.join(sys.argv[1:]))
+
     cmd = [sys.executable]
     src_dir=os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(
                          os.path.dirname(os.path.abspath(sys.argv[0]))))))
     script_dir=os.path.join(src_dir, "third_party", "WebKit", "WebKitTools",
                             "Scripts")
     script = os.path.join(script_dir, 'new-run-webkit-tests')
     cmd.append(script)
     if '--chromium' not in sys.argv:
         cmd.append('--chromium')
     cmd.extend(sys.argv[1:])
     return subprocess.call(cmd)
 
 if __name__ == '__main__':
     sys.exit(main())