This patch changes "directionality-after-undo-replace.html" to utilize
|selection_test()| for ease of maintenance and help to implementing EditingNG.
Bug: 707656, 679977
Change-Id: Ib3b187db88c54a79ba44023f1e2b1c655534232f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2226323
Commit-Queue: Yoshifumi Inoue <yosin@chromium.org>
Auto-Submit: Yoshifumi Inoue <yosin@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#774054}