commit 1dcd6759161d5b2b897c49d42978f9e8c301eb31
author Victor Costan <pwnall@chromium.org> Fri Mar 16 12:31:36 2018
committer Commit Bot <commit-bot@chromium.org> Fri Mar 16 12:31:36 2018
tree 89d649cf603463fb20c6d560591dac222df6f9f2
parent 07ef4996a501f1a447e9e605d927452e9f273d44

Cookie Store: Enable some change tests for CookieStoreIOS.

The iOS CookieStore implementations synchronize (to some degree) a
CookieMonster with the system cookie store. Change detection is
implemented by storing a snapshot of the system cookie store's last seen
contents, and computing diffs between the current system store contents
and the snapshot. This implementation has two major differences from the
CookieMonsterChangeDispatcher implementation:

1) The ordering of changes observed between two snapshots cannot be known.
   However, the CookieStore tests expect changes to be observed in the
   exact order in which the corresponding commands were issued.
2) The current diffing implementation does not distinguish between
   deletion causes. The tests rely on a distinction between OVERWRITE
   and EXPLICIT.

This CL introduces CookieStoreTestTraits members that account for the
differences above, making it possible to run the change tests against
the CookieStoreIOS implementation. CookieStoreIOSPersistent requires
significant changes to pass the tests, so it will be addressed in a
separate CL.

Bug: 729800, 813931
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ib959c4a2d05ef84ab154290ee91f975436a7ee64
Reviewed-on: https://chromium-review.googlesource.com/947844
Commit-Queue: Victor Costan <pwnall@chromium.org>
Reviewed-by: Matt Menke <mmenke@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543673}