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This CL introduces another experimental action Pedal to launch
an incognito tab in a new browser window.

Bug: 893183
Change-Id: I9b0a671f80037ee646a8bfa6401474d9315e430d
Reviewed-on: https://chromium-review.googlesource.com/c/1274204
Commit-Queue: Orin Jaworski <orinj@chromium.org>
Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600082}