tree 94f48914ebcc89a1a43cb6c67a74478c4a7af46b
parent 72ea95ab7705448b044cafc6b8cf2a2f4d929bd9
author Alex Deymo <deymo@google.com> 1459909246 -0700
committer Alex Deymo <deymo@google.com> 1460414542 -0700

delta_generator: Use REPLACE_XZ in deltas when allowed.

This patch moves the generation of the best allowed full operation to a
new function which now includes ZERO, REPLACE, REPLACE_BZ and REPLACE_XZ
when allowed. This function is used to produce a full operation
whenever it is needed in the "full" payload generator and the AB "delta"
payload generator.

Bug: 24578399
TEST=brillo_update_payload generated REPLACE_XZ operations for a delta payload that was using REPLACE_BZ operations and merged them.
TEST=brillo_update_payload generated a full payload with REPLACE, REPLACE_BZ and REPLACE_XZ operations.
TEST=Updated unittests.

(cherry picked from commit 726aeca1c665910593761a1990ee50f22d98f53f)

Change-Id: I50684d5fa429f7110e5535ee4a7f29ac50b5a402