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- Consolidates all button tap actions under 'tap' prefix.
- Consolidates all verification actions under 'verify' prefix.
- Removes single-use methods.

Bug: 1103274
Change-Id: Id398e1c80da233f101a87b9b40eda1b0e45f4bd3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2362700Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Nohemi Fernandez <fernandex@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799539}