commit d423ad87b1fdc8a59a7c945c000bfbbd9d8b2245
author rickyz <rickyz@chromium.org> Fri Jun 19 08:30:26 2015
committer Commit bot <commit-bot@chromium.org> Fri Jun 19 08:31:13 2015
tree 24536861377e7a9faa12c542b14ba148a9fc7e9a
parent eeda21f259f16daefc9a23ba947e92910a9014eb

Enable one PID namespace per process for NaCl processes.

This CL does two things:
 - Make the NaCl helper fork each process into a new PID namespace via
   ForkInNewPidNamespace.
 - Bring the non-NaCl process termination exit codes in line with NaCl's
   default signal handlers, that is exit with an exit code of -sig &
   0xff.

This change depends on https://codereview.chromium.org/1159803003, which
adds termination signals handlers in SFI NaCl.

BUG=460972

Review URL: https://codereview.chromium.org/1158793003

Cr-Commit-Position: refs/heads/master@{#335223}