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The tests already have |Wait| and |OnSuccess| that would process all
the messages required for the tests. Removing these redundant calls to
wait for the title changes as this leads to flakiness.

Bug: 1108551
Change-Id: Id3bf340b5e02697d8a7c847c31cf1bfddd5b59cc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2316801Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Anupam Snigdha <snianu@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#791363}