WebVTT: Update cue alignment to a later spec. version

This implements the updated spec. behavior by removing the dependency
on the (resolved) direction when determining the alignment.

BUG=449521

Review URL: https://codereview.chromium.org/851333003

git-svn-id: svn://svn.chromium.org/blink/trunk@188817 bbb929c8-8fbe-4397-9dbb-9b2b20218538
4 files changed
tree: 9940ac342cbcd8b52db51b03807fc748a1cc3a02
  1. third_party/