Modify temp directory creation so that multiple instances of the script can be run without stepping on one another's temporary toes.
Modify temp directory creation so that multiple instances of the script can be run without stepping on one another's temporary toes.

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/3775007

git-svn-id: http://src.chromium.org/svn/trunk/src@62662 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: efc2a95f075b4f3f3277e8e76bd23c7f189b8fe6
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