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Previously when painting outlines we used LayoutObject::AddOutlineRects()
which adds outline rects in flipped blocks direction. The previous
flipping code in ObjectPainter::PaintOutline() was incomplete, and we
also missed the flipping in other places.

Add LayoutObject::PhysicalOutlineRects() which flips the outline rects
correctly.

Remove internals.outlineRects and internals.focusRingRects and convert
the layout tests using them into unit tests.

Bug: 910643

Change-Id: Ib8b3e0c7cd646e60378c09955ba26334f0f7f9e9
Reviewed-on: https://chromium-review.googlesource.com/c/1352503Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612786}