Missing argument in pyauto.py. Added in the missing argument.
Missing argument in pyauto.py. Added in the missing argument.

Review URL: http://codereview.chromium.org/3007014

git-svn-id: http://src.chromium.org/svn/trunk/src@53875 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 47ce404cc3ac4b5f544e7deb36e840bf57adc28d
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