GitLab

* Update README.md with notes about where data model items are
  stored (db, disk/mem cache)

* Update comment to point to HandleResourceFetchCompleted

* Update section pointers for update spec items

At some point, the AppCache spec gained a new section such that
"6.9.4" became "7.9.4".  This updates any "6.9.4" entries to
"7.9.4".  In at least one place, there were other spec changes so
that the update steps within 7.9.4 also changed.  I've tried to
map them to the correct update step as best I could.

* Update spec pointers for 6.9.5/6.9.6 to 7.9.5/7.9.6

Bug: 1014587
Change-Id: I0a787bd1eae6f5ffbc84dff225d863e8dc80ffc6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1862124
Commit-Queue: Chase Phillips <cmp@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#706319}