tree 3308b30c764d1b1f0031a27c6f06eea2beea170a
parent d189ab6fbd9453a69421d1e61f64be4bc98d2009
author Felipe Erias <felipeerias@igalia.com> 1616081861 +0000
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1616081861 +0000

Don't create unneeded layers for scrollbar-gutter: force

This CL prevents the creation of unnecessary layers for elements
that use scrollbar-gutter's "force" keyword.

Now those layers are created only when the element's style uses
custom scrollbars, because a PaintLayerScrollableArea is required
in order to calculate their thickness.

When the element uses default scrollbars, their thickness can be
obtained directly from the page's scrollbar theme.

Bug: 710214
Change-Id: Ia319e5601745247189be58da8b1e992a34a17c99
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2738895
Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Felipe Erias <felipeerias@igalia.com>
Cr-Commit-Position: refs/heads/master@{#864254}