Updates time values to use aria attributes.

This CL changes the TimeRemaining and TimeElapsed values to use aria
attributes directly instead of explicitly creating accessibility nodes.

Bug: 836549
Change-Id: I7036d9e0a2b8f956f3c88bc9e838e2001830400b
Reviewed-on: https://chromium-review.googlesource.com/c/1393843
Commit-Queue: CJ DiMeglio <lethalantidote@chromium.org>
Reviewed-by: Tommy Steimel <steimel@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#624397}
10 files changed