We should probably replace the unit tests stage by another sanity stage that operates on the sysroot and runs only the fuzzers on a limited corpus.

+1, I think that can be put off for a while though. As I've pointed out, chrome doesn't yet have this. 

I asked kcc about this today, he clarified that this is something that he wants, but agreed that it isn't something strictly needed

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/chromite/+/3c311c15709b2c77c9d70be0a866a775555db08a

commit 3c311c15709b2c77c9d70be0a866a775555db08a
Author: Manoj Gupta <manojgupta@google.com>
Date: Thu May 10 22:10:06 2018

cbuildbot: Disable unit tests in fuzzer builds.

As part of instrumenting the whole system with sanitizer flags,
too many packages and libraries fail to run with current test
infrastructure setup. So disable the unit test stage for now.

BUG= chromium:841512 
TEST=No more unit test stage in amd64-generic-fuzzer builder.

Change-Id: Ib46002da50b2f8eccb37aeb1d7c12a4a5cc48cec
Reviewed-on: https://chromium-review.googlesource.com/1053087
Commit-Ready: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Caroline Tice <cmtice@chromium.org>
Reviewed-by: Jonathan Metzman <metzman@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>

[modify] https://crrev.com/3c311c15709b2c77c9d70be0a866a775555db08a/cbuildbot/builders/fuzzer_builders.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b6297b2be6ab0dde891052b935537b2b29ab499a

commit b6297b2be6ab0dde891052b935537b2b29ab499a
Author: chromite-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com <chromite-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Date: Fri May 11 00:15:20 2018

Roll src/third_party/chromite/ 0aae1c1fc..3c311c157 (4 commits)

https://chromium.googlesource.com/chromiumos/chromite.git/+log/0aae1c1fc30a..3c311c15709b

$ git log 0aae1c1fc..3c311c157 --date=short --no-merges --format='%ad %ae %s'
2018-05-09 manojgupta cbuildbot: Disable unit tests in fuzzer builds.
2018-04-20 bmgordon build_stages: Use snapshot to clean up chroot.
2018-05-04 yunlian generic_stages: temporarily ignore all target prebuilts.
2018-05-08 guocb auto_updater: filter more directories when copy devserver to DUT

Created with:
  roll-dep src/third_party/chromite
BUG= chromium:841512 , chromium:829665 ,chromium:730144, chromium:826418 , chromium:840975 ,chromium:824580


The AutoRoll server is located here: https://chromite-chromium-roll.skia.org

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


TBR=chrome-os-gardeners@chromium.org

Change-Id: I0abebd960beb44b1560aca995781fed1b91f453f
Reviewed-on: https://chromium-review.googlesource.com/1054619
Commit-Queue: Chromite Chromium Autoroll <chromite-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Reviewed-by: Chromite Chromium Autoroll <chromite-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#557735}
[modify] https://crrev.com/b6297b2be6ab0dde891052b935537b2b29ab499a/DEPS

Closing for now. May revisit later on.