tree ccbc60f13501e8ab86cf3951a266e9c0db35de0b
parent eb9e6d8d8813b2d5a81a14e0184f7b4798573606
author Allie Wood <alliewood@chromium.org> 1428967659 -0700
committer ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> 1430442477 +0000

update_engine: Split fragmented SOURCE_COPY ops.

Splits SOURCE_COPY operations with multiple destination extents into
individual SOURCE_COPY operations with only one destination extent each.

Also normalizes the extent lists before splitting the operation.

BUG=chromium:461641
TEST=`cros flash --src-image-to-delta` and unit tests.
CQ-DEPEND=CL:267360

Change-Id: I4d4fbe36165d98df7f36e4a1ddacc9b62ee97002
Reviewed-on: https://chromium-review.googlesource.com/267697
Reviewed-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: Allie Wood <alliewood@chromium.org>
Trybot-Ready: Allie Wood <alliewood@chromium.org>
Tested-by: Allie Wood <alliewood@chromium.org>