[task scheduler] Fix Window: use most recent N commits from any branch
[task scheduler] Fix Window: use most recent N commits from any branch

Bug: skia:
Change-Id: I4e230da71c5122925ec649c4f146fb71af8a1fd5
Reviewed-on: https://skia-review.googlesource.com/17450
Reviewed-by: Ben Wagner <3ef7217be91069877d94f7907ce5479000772cd3@google.com>
Commit-Queue: 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