GitLab

https://chromium-review.googlesource.com/c/chromium/src/+/1906962
changed the CSS variables in cr-icon-button to not have as many
fallbacks. The result was the cr-toolbar CSS that set the focus color
for all cr-icon-button's within it no longer worked as before when
the --enable-features=WebUIA11yEnhancements flag is set. This CL
fixes that.

Bug: 1022752
Change-Id: I671e5664c5fcae7f311e409fa54b645e78f20132
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1916965Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Esmael Elmoslimany <aee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715948}