generally people need a very strong use case to create a new subdir under src/. 
 otherwise, projects should stick to src/platform/ or src/third_party/.

this should be under src/platform/, and either use 'cros-container-guest-tools' or 'container-guest-tools' imo.

My concern with src/platform/ was the implication that this project might be built or distributed for normal CrOS images.

But as I said, don't feel strongly about this. src/platform/ sounds good to me.

src/platform/ hosts all sort of content that isn't built into "normal CrOS repos".  we have partner repos in there (e.g. jetstream) as well as build-time only repos (e.g. dev/ and factory and firmware and such).  at this point, i think we can consider src/platform/ as "all first party stuff that CrOS needs checked out".

i'm not against splitting out stuff from src/platform/ when it makes sense, but i think it's better to let a pattern emerge first and then shuffle around vs adding a single project to a new dir under src/.

if we had sep repos for many of the container related projects instead of hosting them in platform2, i would have said that's a good reason to give a dedicated dir :).

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/chromeos/manifest-internal/+/34dd91e1c264f0d462f5243e736f91898dec38f3

commit 34dd91e1c264f0d462f5243e736f91898dec38f3
Author: Stephen Barber <smbarber@chromium.org>
Date: Thu Aug 23 20:20:59 2018

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/manifest/+/bef0be22b4f22a592e902affa4a8ef16fc8a9387

commit bef0be22b4f22a592e902affa4a8ef16fc8a9387
Author: Stephen Barber <smbarber@chromium.org>
Date: Thu Aug 23 20:20:51 2018

container-guest-tools: add to external manifest

BUG= chromium:876522 
TEST=repo sync

Change-Id: Ia1cbc0cc455bdcca2f9ebfec3203ed8bf7a82ef7
Reviewed-on: https://chromium-review.googlesource.com/1185733
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>

[modify] https://crrev.com/bef0be22b4f22a592e902affa4a8ef16fc8a9387/full.xml

Verified on ToT