security_SandboxedServices: ignore zombie processes.

BUG=chromium:422700
TEST=Passes on daisy_spring, expresso.

Change-Id: I2463a47e200f0c77af22c1873f765bdf9886ccb9
Reviewed-on: https://chromium-review.googlesource.com/223121
Tested-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
1 file changed