Revert 251265 "Setuid sandbox: exit(2) on SIGABRT"

Revert 251265 "Setuid sandbox: exit(2) on SIGABRT"

> Setuid sandbox: exit(2) on SIGABRT
> 
> The setuid sandbox waits on its one child and then dies
> afterwards.
> 
> When receiving SIGABRT, instead of dumping core, simply exit the
> process. There is no interesting information to be gathered from
> knowing that the process is inside waitid(2), one should look at
> the child process instead.
> 
> This patch hopes to reduce red herrings.
> 
> BUG=334345
> NOTRY=true
> R=jorgelo@chromium.org
> 
> Review URL: https://codereview.chromium.org/165673002

TBR=jln@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=251269

[jln (very slow on Chromium), 2014-02-14 07:31:05]

Committed patchset #1 manually as r251269 (tree was closed).