GitLab

cc::ScrollTimeline::ScrollDirection uses different enums from the spec
because it does not know about the writing modes. Adding comments to
reduce ambiguity.

Bug: None
Change-Id: I1f9bf443df42d52a1a5bd9960423d2fa94d4f565
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1949113
Commit-Queue: Yi Gu <yigu@chromium.org>
Reviewed-by: Majid Valipour <majidvp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721161}