tree 28b65bfe1bbabecb8a4a17f6cbc097197e9a2545
parent b258d5df36ce010053017146a79f287d8a31e874
author Erick Tryzelaar <etryzelaar@google.com> 1530923666 -0700
committer Erick Tryzelaar <etryzelaar@google.com> 1531241084 -0700

Properly parse expiration time

The golang oauth2 library's `Token` doesn't have an "expires_in"
field. Instead oauth2 internally parses the expiration into a future
unix timestamp. So before this patch, the tokens that oauth2device
was producing didn't properly capture the expiration time. This patch
fixes it by copying the logic from oauth2, which is unfortunately
not exposed in a way that we can directly use.

Change-Id: Idec2632c5d4cb272d9d2e8e0099972ad9dda9c3d