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This patch adds user actions for the icons in the edit-url suggestion
(copy, edit, and share) as well as actions for the omnibox long-press
menu.

Bug: 881292
Change-Id: I24db676134df34bb7cdf197bb2fc93c84dc86dcd
Reviewed-on: https://chromium-review.googlesource.com/c/1419339Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625815}