Fix pyauto bustage on mac.
Fix pyauto bustage on mac.

Review URL: http://codereview.chromium.org/5322004

git-svn-id: http://src.chromium.org/svn/trunk/src@67188 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 0b7b07e493de2f2e48aca83eee87704b124ae42f
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser