GitLab

This CL adds a DwoC to monitor for cases where CanAccessDataForOrigin
encounters zero BrowsingInstanceIds. We believe these were fixed in
https://chromium-review.googlesource.com/c/chromium/src/+/2523732 and
https://chromium-review.googlesource.com/c/chromium/src/+/2522904 but
in case there are other pathways that can lead to this condition we
need to be vigilant.

This is being landed in a separate CL to make it easy to revert.

Bug: 1135539, 1141721
Change-Id: I387693c4d8543bda79cee5e2c2d2c9cae57b0f0a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2532873Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Commit-Queue: James MacLean <wjmaclean@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826458}