[reading-flow] Display: contents elements can be focusable #46953
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CSSWG has resolved that reading-flow does not affect whether an element
is focusable. Given this, we should remove the check in Element that
forbids display: contents with reading-flow to be focusable.
We update the FocusNavigation logic such that the display: contents
elements are visited last, after all reading flow items found within the
layout box.
Change-Id: Iadd9636166628361b001df7b63b2ee98072a89d5
Bug: 346979043
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5656691
Reviewed-by: Mason Freed <masonf@chromium.org>
Commit-Queue: Di Zhang <dizhangg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1321829}