Linux: reap the sandbox helper process.
Linux: reap the sandbox helper process.

TEST=start chrome with a SUID sandbox and check that no zombies persist.

http://codereview.chromium.org/149734


git-svn-id: http://src.chromium.org/svn/trunk/src@20838 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: a79f2b202ce2680d4b5b48b48e191826d1fb618d
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