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Also adds support for interrupts (currently untested). Interrupts in
general appear to have very poor coverage. I created b/161652848 to
track this independently.

Bug: b/145043394
Change-Id: I48a4cdaf9a0bf45b0e206f8bf2787a13122c45d6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2306037Reviewed-by: Luca Hunkeler <hluca@google.com>
Reviewed-by: Sandro Maggi <sandromaggi@google.com>
Reviewed-by: Marian Fechete <marianfe@google.com>
Commit-Queue: Clemens Arbesser <arbesser@google.com>
Cr-Commit-Position: refs/heads/master@{#790357}