Make AppRegistryCache consistent under recursion

BUG=826982

Change-Id: I1feaec0eae9a0d2413ce4b2200da1d87b798ae98
Reviewed-on: https://chromium-review.googlesource.com/c/1352124
Commit-Queue: Nigel Tao <nigeltao@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611581}
2 files changed