[autoroll] Fixes for AssetRepoManager
[autoroll] Fixes for AssetRepoManager

Can't check the local master branch, need to check origin/master.

Bug: skia:
Change-Id: I7e36f8d341fdfff71a68f1e3dc0442555660c5f5
Reviewed-on: https://skia-review.googlesource.com/c/159561
Commit-Queue: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com>
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@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