crash: sandbox crash collector

BUG=chromium:766275
TEST=crash_reporter still reports crashes successfully.

Change-Id: Ic50e1d5d7689950273a98c9ddf67dcf74a71387a
Reviewed-on: https://chromium-review.googlesource.com/672943
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Mattias Nissler <mnissler@chromium.org>
2 files changed