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Credit to sky@ for EventUtils.java (salvaged from
47bd294d, which got reverted)

Bug: none
Change-Id: Iadb75c6b9c77185536c753504b6cefa1ba4796de
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1866987Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#707864}