commit a5a47f2f0ae0b0ec8e114f0023d1bae7290475cd
author smcgruer <smcgruer@chromium.org> Tue Jul 04 15:48:41 2017
committer Commit Bot <commit-bot@chromium.org> Tue Jul 04 15:48:41 2017
tree d7a262c0114fd2a84a006307e8a7c7982a830849
parent 38d8bb9328a2d0a1b7d8373ddd70971c1ce4eeb6

Basic ScrollTimeline implementation for Animation Worklet

This is based on the WICG spec[0], but simplified for the Animation Worklet
origin trial. Specifically, the following things were changed from the spec:

  * ScrollDirection only has two values: "block" and "inline".
  * Dropped startScrollOffset.
  * Dropped endScrollOffset.
  * timeRange is not allowed to be "auto".
  * Dropped fill.

[0] https://wicg.github.io/scroll-animations/#scrolltimeline-interface

BUG=719517

Review-Url: https://codereview.chromium.org/2873493002
Cr-Commit-Position: refs/heads/master@{#484117}