[push] Use DefaultAuth logging.
[push] Use DefaultAuth logging.

Bug: skia:
Change-Id: I3e78876262bf01c3778403d6fc13166bd91a5a71
Reviewed-on: https://skia-review.googlesource.com/118661
Commit-Queue: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>
Reviewed-by: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@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