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This class is superseded by MdTextButton and was only used in views
example files.

Bug: None
Change-Id: Ic8740ff51e87bea5e753467ca017db181db76c30
Reviewed-on: https://chromium-review.googlesource.com/c/1298639Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#603150}