commit ab6a9b9d2a9b83dabfe6cb6f39763f3013ca8d24
author Nigel Tao <nigeltao@chromium.org> Wed Jan 09 03:57:15 2019
committer Commit Bot <commit-bot@chromium.org> Wed Jan 09 03:57:15 2019
tree 6e00a478d16fa535827cad9f315b6d7b0159b95f
parent 9ef8913d3353ca23cc7844205962fe62c25c842c

Let AppRegistryCache.OnApps recurse

Having cache.OnApps notifying observer.OnAppsUpdate calling cache.OnApps
should be pretty rare, but if it does happen, we should behave sensibly.

Sensibly includes maintaining the consistency condition that if calling
cache.ForEachApp or cache.ForOneApp, the AppRegistryCache should present
a consistent view of the world: the inner and outer AppUpdate's should
be equal.

Sensibly also includes that delta's passed to OnApps should be processed
in FIFO, not LIFO order. Each delta builds on the sum of previous ones.

BUG=826982

Change-Id: I99b99b99176dd0afff6281814c0a20a025b9d462
Reviewed-on: https://chromium-review.googlesource.com/c/1388348
Commit-Queue: Nigel Tao <nigeltao@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#621041}