Async Clipboard: Use kUserInteraction TaskRunner

Use a kUserInteraction is a more specific and appropriate TaskType than the
current kMiscPlatformAPI. DataTransfer uses kUserInteraction, and many
Async Clipboard API calls may require user interaction.

Bug: 941835
Change-Id: Ib5ffcd27c36e41228ffd41f421066f41a6278bd2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1529745
Commit-Queue: Darwin Huang <huangdarwin@chromium.org>
Reviewed-by: Gary Kacmarcik <garykac@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#641990}
1 file changed