I have a CL out for a documentation typo, but this is implemented in https://chromium.googlesource.com/chromium/src/+/75d2c9f905a4e994d6f41c5104a24f7a0e4745ac

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/123b6a15aabf3f38abc1c633383924d652bb433d

commit 123b6a15aabf3f38abc1c633383924d652bb433d
Author: Lucas Garron <lgarron@chromium.org>
Date: Wed Sep 27 23:41:00 2017

Update NavigationThrottle::CancelDeferredNavigation() comment to specifically refer to the ThrottleCheckResult's action.

Bug:  762430 
Change-Id: Ieaea62732d604ca56fb3cdb97e96a4ac98e76f15
Reviewed-on: https://chromium-review.googlesource.com/686102
Reviewed-by: Nasko Oskov <nasko@chromium.org>
Commit-Queue: Lucas Garron <lgarron@chromium.org>
Cr-Commit-Position: refs/heads/master@{#504803}
[modify] https://crrev.com/123b6a15aabf3f38abc1c633383924d652bb433d/content/public/browser/navigation_throttle.h