We'd like to merge https://chromium-review.googlesource.com/c/chromium/src/+/1375951 to M-72. This is simple and not risky fix. I've tested it in Canary.

That CL was not committed on this bug, sorry, I forgot to add link to this bug in CL description. I'll add link to this bug during merge.

This bug requires manual review: M72 has already been promoted to the beta branch, so this requires manual review
Please contact the milestone owner if you have questions.
Owners: govind@(Android), kariahda@(iOS), djmm@(ChromeOS), abdulsyed@(Desktop)

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

dvadym@ is this change part of a feature going out in M72? 

yes, this is a part of the feature for M72. It's just a small fix for it.

branch:3626

This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

If all merges have been completed, please remove any remaining Merge-Approved labels from this issue.

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

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3ba32a180b7964ad2b63a87f3af5739e6a77eccd

commit 3ba32a180b7964ad2b63a87f3af5739e6a77eccd
Author: Vadym Doroshenko <dvadym@chromium.org>
Date: Thu Dec 27 09:23:17 2018

Create PasswordFormManager for non-html forms.

NewPasswordFormManager doesn't support yet forms with non-html schemes.
These forms correspond to http authentication. The full implementation
is in progress
https://chromium-review.googlesource.com/c/chromium/src/+/1369796. This
CL is quick fix, just to use PasswordFormManager for such forms,
that allow to fix saving on http auth forms.

TBR=dvadym@chromium.org

(cherry picked from commit b95f5189e48619c2ee50571fd3c9b5f9aad3cbda)

Bug: 831123,  915161 
Change-Id: Id90f743ec8019df408f6daafa5634f17cdbf9bae
Reviewed-on: https://chromium-review.googlesource.com/c/1375951
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Commit-Queue: Vadym Doroshenko <dvadym@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#617090}
Reviewed-on: https://chromium-review.googlesource.com/c/1391365
Reviewed-by: Vadym Doroshenko <dvadym@chromium.org>
Cr-Commit-Position: refs/branch-heads/3626@{#524}
Cr-Branched-From: d897fb137fbaaa9355c0c93124cc048824eb1e65-refs/heads/master@{#612437}
[modify] https://crrev.com/3ba32a180b7964ad2b63a87f3af5739e6a77eccd/chrome/browser/password_manager/password_manager_browsertest.cc
[modify] https://crrev.com/3ba32a180b7964ad2b63a87f3af5739e6a77eccd/components/password_manager/core/browser/password_manager.cc

The following revision refers to this bug: 
https://chromium.googlesource.com/chromium/src.git/+/3ba32a180b7964ad2b63a87f3af5739e6a77eccd

Commit: 3ba32a180b7964ad2b63a87f3af5739e6a77eccd
Author: dvadym@chromium.org
Commiter: dvadym@chromium.org
Date: 2018-12-27 09:23:17 +0000 UTC

Create PasswordFormManager for non-html forms.

NewPasswordFormManager doesn't support yet forms with non-html schemes.
These forms correspond to http authentication. The full implementation
is in progress
https://chromium-review.googlesource.com/c/chromium/src/+/1369796. This
CL is quick fix, just to use PasswordFormManager for such forms,
that allow to fix saving on http auth forms.

TBR=dvadym@chromium.org

(cherry picked from commit b95f5189e48619c2ee50571fd3c9b5f9aad3cbda)

Bug: 831123,  915161 
Change-Id: Id90f743ec8019df408f6daafa5634f17cdbf9bae
Reviewed-on: https://chromium-review.googlesource.com/c/1375951
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Commit-Queue: Vadym Doroshenko <dvadym@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#617090}
Reviewed-on: https://chromium-review.googlesource.com/c/1391365
Reviewed-by: Vadym Doroshenko <dvadym@chromium.org>
Cr-Commit-Position: refs/branch-heads/3626@{#524}
Cr-Branched-From: d897fb137fbaaa9355c0c93124cc048824eb1e65-refs/heads/master@{#612437}