Remove run_webkit_tests dependency on third_party\python_24....

webkit/tools/layout_tests/run_webkit_tests.py

Index: webkit/tools/layout_tests/run_webkit_tests.py
===================================================================
--- webkit/tools/layout_tests/run_webkit_tests.py	(revision 42382)
+++ webkit/tools/layout_tests/run_webkit_tests.py	(working copy)
@@ -10,6 +10,15 @@
 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]))))))