[gold] Fix broken Puppeteer tests.
[gold] Fix broken Puppeteer tests.

These tests were broken after https://skia-review.googlesource.com/c/buildbot/+/289616 landed.

Bug: skia:10246
Change-Id: I4a012dda196610eafee326543f78c51b86bec7d4
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/289626
Reviewed-by: Leandro Lovisolo <f558143c2568be8d55575d13f30a1fc5cb8009d5@google.com>
Commit-Queue: Leandro Lovisolo <f558143c2568be8d55575d13f30a1fc5cb8009d5@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot