CHROMIUM: disable OOM killer for all jobs

This is an alternate patch for the bug, rather than adding a job to
the very critical path, spawning a shell, and adding to our boot
time; simply have Upstart set its own oom score, and only adjust in
children where they are configured to differ.

BUG=chromium-os:16450
TEST=compiled and checked result

Reviewed-on: https://chromium-review.googlesource.com/5359
Change-Id: If4f218c1435c780a00ab34e95c7650366db99627
2 files changed