GitLab

The current calculation for collapsing the message center when expanding the
quick settings is not the same as the calculation when creating the message
center. These should be consistent.

Additionally, the current calculation for the expanded quick settings height is
not correct either.

TEST=manual
BUG=1019926

Change-Id: I7ba344af148bea12ccaaf431c4b52c151f2b58ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1891757Reviewed-by: Ahmed Mehfooz <amehfooz@chromium.org>
Commit-Queue: Ahmed Mehfooz <amehfooz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712198}