Remove HasOverflowModel.

Change the one callsite to query layout and visual overflow
separately.

Change-Id: Ibeb21ca7c6d244c5eddb183637a38d75380e9a80
Reviewed-on: https://chromium-review.googlesource.com/c/1407348
Reviewed-by: Aleks Totic <atotic@chromium.org>
Commit-Queue: Chris Harrelson <chrishtr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#622220}
4 files changed