Merge "Revert "Precompute cursor indexes in DocumentsUI and improve perf by 2.7%."" into nyc-dev am: ee6d8be am: 38429fe
am: c296f3a

* commit 'c296f3a6365d18ec90dfbb11cf503db2fc8ab504':
  Revert "Precompute cursor indexes in DocumentsUI and improve perf by 2.7%."

Change-Id: I0b3a676cdcc50c6cf91440d1a856d8087835b60a