This is a workaround for multiprocessing on Windows. Importing in Python on
Windows doesn't search for imports that don't end in .py (and aren't
directories with an __init__.py). So, add this wrapper to avoid having
people change their command line to add a .py when running gyp_chromium.
R=dmazzoni@chromium.org
Review URL: https://codereview.chromium.org/11066021
git-svn-id: http://src.chromium.org/svn/trunk/src/build@160151 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
scottmg@google.com