Thanks for filing the issue...

@Reporter : Tried with multiple sites but we are unable to find the very long cookie names, It would be really helpful if a sample URL is provided, so that we can investigate the issue further.

Thanks.!

Could I take this issue if there is no one working on this? :)

I fixed this issue by following method. 

The CL is ready to review. (https://chromium-review.googlesource.com/c/chromium/src/+/1202362)

Deleted: cookies_with_longnames.png 10.9 KB

	cookies_with_longnames.png 10.9 KB View Download

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/dad5078abe1c03f8a3593c54006be3a1c300d77d

commit dad5078abe1c03f8a3593c54006be3a1c300d77d
Author: Jdragon <jdragon.bae@gmail.com>
Date: Thu Sep 20 11:42:18 2018

Fix that cookies with long names can't be deleted

This change fix settings css to access expand and delete icons.
As a Result, cookies with long names can be deleted.

Bug:  871639 
Change-Id: Ic3c090d8593ea78b61be656a316b49e240fe6b42
Reviewed-on: https://chromium-review.googlesource.com/1202362
Commit-Queue: Jinho Bang <jinho.bang@samsung.com>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592760}
[modify] https://crrev.com/dad5078abe1c03f8a3593c54006be3a1c300d77d/chrome/browser/resources/settings/site_settings/site_data_details_subpage.html
[modify] https://crrev.com/dad5078abe1c03f8a3593c54006be3a1c300d77d/ui/webui/resources/cr_elements/cr_expand_button/cr_expand_button.html

jdragon.bae@ - Tried testing the issue by navigating to different sites but couldn't find any long cookie in chrome://settings.
Could you please provide sample url to verify the fix from our end.

Thanks...!! 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/51c7ec50350d18e5a26cb609d5b3b84ef155d9de

commit 51c7ec50350d18e5a26cb609d5b3b84ef155d9de
Author: Steven Bennetts <stevenjb@chromium.org>
Date: Fri Sep 21 17:01:17 2018

Revert "Fix that cookies with long names can't be deleted"

This reverts commit dad5078abe1c03f8a3593c54006be3a1c300d77d.

Reason for revert:  crbug.com/887868 

Original change's description:
> Fix that cookies with long names can't be deleted
> 
> This change fix settings css to access expand and delete icons.
> As a Result, cookies with long names can be deleted.
> 
> Bug:  871639 
> Change-Id: Ic3c090d8593ea78b61be656a316b49e240fe6b42
> Reviewed-on: https://chromium-review.googlesource.com/1202362
> Commit-Queue: Jinho Bang <jinho.bang@samsung.com>
> Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#592760}

TBR=stevenjb@chromium.org,jinho.bang@samsung.com,jdragon.bae@gmail.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug:  871639 
Change-Id: I3a2f8c3d75a91ddd54b406f2e4ca37e0f20db3cc
Reviewed-on: https://chromium-review.googlesource.com/1238813
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593232}
[modify] https://crrev.com/51c7ec50350d18e5a26cb609d5b3b84ef155d9de/chrome/browser/resources/settings/site_settings/site_data_details_subpage.html
[modify] https://crrev.com/51c7ec50350d18e5a26cb609d5b3b84ef155d9de/ui/webui/resources/cr_elements/cr_expand_button/cr_expand_button.html

 krajshree@ Here is sample url :)
http://ec2-52-7-215-33.compute-1.amazonaws.com/

I fixed this issue another way.
https://chromium-review.googlesource.com/c/chromium/src/+/1239953

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	longcookie_with_focus.png 13.5 KB View Download

I navigated to http://ec2-52-7-215-33.compute-1.amazonaws.com/ but I do not see a cookie with a long name to test. Can you provide a full repro (starting with clearing cookies)? Thanks!

stevenjb@: Here it is. https://github.com/jdragonbae/long-name-cookie

I'm not sure what I'm expected to do with that git repro? I'm looking for a simple set of steps to reproduce this with.

Here is a much easier way to repro.

1) Go to www.google.com and open the dev tools.
2) Type the following in the console (this will create a cookie with a long name)

let value = '';
for(let i=0; i<1000; i++) value+='a';
document.cookie = `${value}=myCookie`

3) Go to chrome://settings/siteData. Look for www.google.com. Try to delete the cookie (delete button is not visible).

Deleted: cookie_name.png 20.5 KB

	cookie_name.png 20.5 KB View Download

And a potential fix is to simply add "word-break: break-word" in CSS for cr-expand-button, see screenshot.

Deleted: cookie_name_fixed.png 30.8 KB

	cookie_name_fixed.png 30.8 KB View Download

Candidate fix at https://chromium-review.googlesource.com/c/chromium/src/+/1274891.

stevenjb@: Sorry, I was mistaken.

Steps to reproduce the problem:
1. Goto site (http://ec2-52-7-215-33.compute-1.amazonaws.com)
2. Goto Settings and bring up the cookies for the site.
3. Observe that you do not have the option to delete cookies with very long names.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/079433c8fd6ce5ba45eaa56c087bdc925b3c67c8

commit 079433c8fd6ce5ba45eaa56c087bdc925b3c67c8
Author: dpapad <dpapad@chromium.org>
Date: Thu Oct 11 02:54:15 2018

Settings WebUI: Fix case where a cookie with a long name can't be deleted.

The long name was not properly wrapped to multiple lines, causing the delete
button to not be visible.

Bug:  871639 
Change-Id: Ibd95caeb9345edb660f3a7032705c15d6d719325
Reviewed-on: https://chromium-review.googlesource.com/c/1274891
Reviewed-by: Esmael El-Moslimany <aee@chromium.org>
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#598645}
[modify] https://crrev.com/079433c8fd6ce5ba45eaa56c087bdc925b3c67c8/chrome/browser/resources/settings/site_settings/site_data_details_subpage.html

Able to reproduce this issue on Windows 10, Mac OS 10.13.3 and Ubuntu 17.10 on the reported version 68.0.3440.84 and the issue is fixed on the latest M-71 build 71.0.3578.0 as per comment #16.
Able to view the delete button for cookies with long names.

Attached is the screen cast for reference. 

Hence adding TE verified labels as the fix is working as intended.

Thanks..

Deleted: 871639-M71.mp4 1.5 MB

	871639-M71.mp4 1.5 MB View Download