The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d4e617ae3c13cb02ac784df04deb8e44b82de395

commit d4e617ae3c13cb02ac784df04deb8e44b82de395
Author: eugenebut <eugenebut@chromium.org>
Date: Wed Dec 28 16:45:25 2016

[ios] Do not use CRWWebController in MainController.

New code uses web::NavigationManager which is the same program flow.
Old code would tolerate nil CRWWebController, while the new code will
crash (which should not happen in practice).

BUG= 616288 

Review-Url: https://codereview.chromium.org/2600963002
Cr-Commit-Position: refs/heads/master@{#440854}

[modify] https://crrev.com/d4e617ae3c13cb02ac784df04deb8e44b82de395/ios/chrome/app/DEPS
[modify] https://crrev.com/d4e617ae3c13cb02ac784df04deb8e44b82de395/ios/chrome/app/main_controller.mm

This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

Sorry for the inconvenience if the bug really should have been left as Available.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

We already have specific bugs for every use of private ios/web API.