GitLab

Ahmed asked about the difference between ScopedExclude and
ScopedForceVisible, which tells me the docs aren't good enough.
Attempts to better describe what happens with the two.

BUG=none
TEST=doc only change

Change-Id: Ia3b798b77f7609ad70dd9f8bed0f50157b10a6e7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1604327
Commit-Queue: Scott Violet <sky@chromium.org>
Reviewed-by: François Doray <fdoray@chromium.org>
Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659149}