tree ba207f8f0201cc1efaf1b69572de1ca54434777e
parent ed8493901eaa9a893b2e939f85b173628f238e25
author Daniel Wang <wonderfly@google.com> 1443044326 -0700
committer chrome-bot <chrome-bot@chromium.org> 1443224327 -0700

lib/gce.py: Use the new usable auth feature

I spoke with the Google API Python client library authors. They confirmed that a
complete solution for service account json keys is not yet available, but there
is already a publich API that we can use in non-interpersonate cases.
GoogleCredentials implements whatever I had to manually do for json key parsing.

BUG=brillo:1196
TEST=Unit tests in CL:299694 and a trybot run against a config that has GCE
tests enabled.

Change-Id: I7180463b1fb392e90068e0999cd47462ce1b1419
Reviewed-on: https://chromium-review.googlesource.com/302043
Commit-Ready: Daniel Wang <wonderfly@google.com>
Tested-by: Daniel Wang <wonderfly@google.com>
Reviewed-by: Fang Deng <fdeng@chromium.org>