Tentatively marking as RB-Beta given impact and marking for M49 given the issue description.  Selim, ping me if you don't think this should gate.

I think release block beta is proper. I will look at this today. Dgn you were looking at and modifying auth stuff for kerberos. any opinions here?

asanka@, any advise to trobleshoot this?

I did a bisect and it is approximately the range kerberos stuff landed.

https://chromium.googlesource.com/chromium/src/+log/49.0.2579.0..49.0.2589.0?pretty=fuller&n=10000

+aberent

Strange, AFAIK only basic and digest auth were supported on WebView before. I changed the way the HttpAuthHandler is created in https://codereview.chromium.org/1492943002, and explicitly set basic, digest and negotiate as supported schemes (in aw_url_request_context_getter.cc). That might be the cause.

yeah I saw that, I think negotiate also contains NTLM, but definitely no expert on that. I actually changed it and forced to be NTLM and nothing changed. 

There's a distinct NTLM scheme separate from Negotiate
On Tue, Mar 1, 2016 at 5:42 PM sgurun@chromium.org via Monorail <
monorail@chromium.org> wrote:

the actual range is: https://chromium.googlesource.com/chromium/src/+log/49.0.2579.0..49.0.2589.0?pretty=fuller&n=10000

Either your change or aberent's change has the likelihood of being the cause.

thanks Chris.

sorry, I pasted the wrong link
https://chromium.googlesource.com/chromium/src/+log/49.0.2584.0..49.0.2585.0?pretty=fuller&n=10000

actually I think aberent's change is out. Your's is the only culprit :)

yes reverting dgn's https://codereview.chromium.org/1492943002
made it work.

There were a zillion number of conflicts in just 4 files though. Oh boy.

I think just adding "ntlm" to line 281 (std::vector<std::string> supported_schemes = {"basic", "digest", "negotiate"}) should work, but I don't know how long it will take me to test this. I'm now in MTV and need to fix my setup to try it away from my workstation

already figured it out. compiling for testing now :)

ok my previous try was wrong because I mistyped ntlm as NTLM :( now I added it properly, it started working. 

It turned out that the default auth negotiate hadnler was creating ntlm which I did not know

https://code.google.com/p/chromium/codesearch#chromium/src/net/http/http_auth_handler_factory.cc&sq=package:chromium&l=53&rcl=1456835474

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/687ddf92e191ac5de2c356c7faaf471d5a2ae787

commit 687ddf92e191ac5de2c356c7faaf471d5a2ae787
Author: Selim Gurun <sgurun@google.com>
Date: Wed Mar 02 00:31:32 2016

Add ntlm to the list of auth protocols

BUG= 590689 

The trunk CL is landing at https://codereview.chromium.org/1754013002/

Review URL: https://codereview.chromium.org/1753713003 .

Cr-Commit-Position: refs/branch-heads/2623@{#558}
Cr-Branched-From: 92d77538a86529ca35f9220bd3cd512cbea1f086-refs/heads/master@{#369907}

[modify] https://crrev.com/687ddf92e191ac5de2c356c7faaf471d5a2ae787/android_webview/browser/net/aw_url_request_context_getter.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6b20b223acdd7b11a164833e7772f4f75618321c

commit 6b20b223acdd7b11a164833e7772f4f75618321c
Author: sgurun <sgurun@chromium.org>
Date: Wed Mar 02 01:03:29 2016

Add ntlm to the list of auth protocols

BUG= 590689 

Review URL: https://codereview.chromium.org/1754013002

Cr-Commit-Position: refs/heads/master@{#378638}

[modify] https://crrev.com/6b20b223acdd7b11a164833e7772f4f75618321c/android_webview/browser/net/aw_url_request_context_getter.cc

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/bling/chromium.git/+/687ddf92e191ac5de2c356c7faaf471d5a2ae787

commit 687ddf92e191ac5de2c356c7faaf471d5a2ae787
Author: Selim Gurun <sgurun@google.com>
Date: Wed Mar 02 00:31:32 2016

Your change meets the bar and is auto-approved for M50 (branch: 2661)

Thanks Selim! Will this fix be part of WebView 49?

yes

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/bling/chromium.git/+/6b20b223acdd7b11a164833e7772f4f75618321c

commit 6b20b223acdd7b11a164833e7772f4f75618321c
Author: sgurun <sgurun@chromium.org>
Date: Wed Mar 02 01:03:29 2016

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b1d8a8d216eaed8dab7c400bd8ff49152c808d13

commit b1d8a8d216eaed8dab7c400bd8ff49152c808d13
Author: Selim Gurun <sgurun@google.com>
Date: Wed Mar 02 15:25:24 2016

Add ntlm to the list of auth protocols

BUG= 590689 

Review URL: https://codereview.chromium.org/1754013002

Cr-Commit-Position: refs/heads/master@{#378638}
(cherry picked from commit 6b20b223acdd7b11a164833e7772f4f75618321c)

Review URL: https://codereview.chromium.org/1756173002 .

Cr-Commit-Position: refs/branch-heads/2661@{#44}
Cr-Branched-From: ef6f6ae5e4c96622286b563658d5cd62a6cf1197-refs/heads/master@{#378081}

[modify] https://crrev.com/b1d8a8d216eaed8dab7c400bd8ff49152c808d13/android_webview/browser/net/aw_url_request_context_getter.cc

From comment #6 - 

   I did a bisect and it is approximately the range kerberos stuff landed.

Does this mean that WebView now supports Kerberos authentication from version 49?

Yes it does. You have to set some policies to enable it: https://www.chromium.org/administrators/policy-list-3#AuthAndroidNegotiateAccountType