tree a09e61949e1c12e2b20aca8afc191076b7a33ae2
parent 9780794ffba0240ef95713e0e0a70380fae82189
author Neil Birkbeck <birkbeck@google.com> 1521730516 -0700
committer Andrey Norkin <anorkin@netflix.com> 1524185848 +0000

Score flat blocks and always return some.

Adding score of flat blocks so that we can return some flat
blocks in the extremely noisy cases. This is a no-op for easier cases.

Change-Id: I99387a642bc84ceb468e5360d3e023735f693843