GitLab

Substitutes a string-based check in |startListeningMessageAnimation_|
for a proper check of the current state in the speech module.
Adjusts tests (and adds new ones) accordingly.
Removes last TODO from voice.js.

Bug: 583291
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ica08d32233eb69ae5b1930aeb00f34e879eadddf
Reviewed-on: https://chromium-review.googlesource.com/663731
Commit-Queue: Ondrej Škopek <oskopek@google.com>
Reviewed-by: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#501626}