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This has now been fully replaced with HighlightPathGenerator instances.

Bug: chromium:1007546
Change-Id: Id163bd002143bc4b044dcd815abb5aa45d4e41c8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1864381Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#706536}