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This adds integration tests for our current input actions.
Once we start experimenting, these should ensure that we
are not breaking currently working behaviour.

Bug: b/168107066
Bug: b/169924567
Change-Id: I141f4033e0080e8c99e0b1280e8521d2bc45e837
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2484422
Commit-Queue: Sandro Maggi <sandromaggi@google.com>
Reviewed-by: Luca Hunkeler <hluca@google.com>
Cr-Commit-Position: refs/heads/master@{#818409}