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On Chrome OS, there's no way to access notifier settings bubble from
outside MessageCenterView, as right click menu is removed and inline
settings is introduced. Therefore, they are dead code right now.

BUG=802997

Change-Id: If498fa9b8949975d4c7c06a38667798b7124fc12
Reviewed-on: https://chromium-review.googlesource.com/1168268Reviewed-by: Yoshiki Iguchi <yoshiki@chromium.org>
Commit-Queue: Tetsui Ohkubo <tetsui@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582490}