Wyatt Allen e30596b677 Polyfill parent-indexed change file API
When loading image diffs as API support for parent-indexed change files
rolls out, request the fast version first and fall back to the existing,
slower version if that fails.

Bug: Issue 5751
Change-Id: I1d3916e2fdfda66a7925825c6b3fbfbf178b4c36
2017-05-05 10:35:14 -07:00
..
2017-04-19 16:12:56 -07:00