Also seeing the same for windows have impacted customer, steps to reproduce:
1. Access Google Map (as an example)
2. Drag and Drop the URL to Desktop
3. Open a new tab and enter chrome://apps
4. Drag and Drop the shortcut created on the Desktop to chrome://apps
5. Shortcut is created with a blue box icon

[Expected Behaviour]
Content of favicon.ico of the link in chrome://apps

[Actual Behaviour]
Blue box as an icon in link in chrome://apps 

It looks like very old regression, as we reproduced it in MTV-QD5 on 58,59,60, but version 55 works fine.

Richard, can you please help us to triage?

Deleted: Jul 27 2017 8-02 AM.webm 4.0 MB

	Jul 27 2017 8-02 AM.webm 4.0 MB View Download

P.s. creating a link using hc https://support.google.com/chrome_webstore/answer/3060053?hl=en
has same effect

Reproduced on M61 9765.5.0/61.0.3163.11 too.

Some of the app icons are now default
   Google My Maps
   Google Deawings
   Google Forms
   Google Sites

+Josafat (ChromeOS TPM) and Mano (M60 stability owner)

Adding "Needs-Triage" label so this gets looked at by the test team.

Let me work on the bisect.

Here is the narrow bisect: https://chromium.googlesource.com/chromium/src/+log/111fdd030ce49ce1de525ac10a983bed8fd8720e..32426e0c6511485debbf3b7c77e87791b6b3ec93

estade@, can you please look into this change (https://chromium.googlesource.com/chromium/src/+/32426e0c6511485debbf3b7c77e87791b6b3ec93) ?

Thank you!

FYI:
Good Build# 56.0.2924.0
Bad Build# 57.0.2979.0

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a1dbafbd845d0e5f33848327b2562f818a616acd

commit a1dbafbd845d0e5f33848327b2562f818a616acd
Author: Evan Stade <estade@chromium.org>
Date: Thu Aug 10 17:40:30 2017

Restore functionality for generateAppForLink

It turns out the dominant color codepath was still in use. If you drag
a link to the NTP, it will use the favicon and a dominant color stripe
for the app (link) it creates.

ExtensionIconSource::GetIconURL will always return a valid URL but it
may be for a default icon. IconsInfo::GetIconURL will return an empty
URL if a non-default icon is not available.

This CL mostly just resurrects pre-existing code. FaviconWebUIHandler
is now dubbed AppIconWebUIHandler.

Bug:  749889 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I014f974e9e2bf662313ae8c118915ae8fd6b125e
Reviewed-on: https://chromium-review.googlesource.com/599073
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#493449}
[modify] https://crrev.com/a1dbafbd845d0e5f33848327b2562f818a616acd/chrome/browser/extensions/extension_icon_manager.cc
[modify] https://crrev.com/a1dbafbd845d0e5f33848327b2562f818a616acd/chrome/browser/extensions/extension_icon_manager.h
[modify] https://crrev.com/a1dbafbd845d0e5f33848327b2562f818a616acd/chrome/browser/extensions/extension_icon_manager_unittest.cc
[modify] https://crrev.com/a1dbafbd845d0e5f33848327b2562f818a616acd/chrome/browser/resources/ntp4/apps_page.css
[modify] https://crrev.com/a1dbafbd845d0e5f33848327b2562f818a616acd/chrome/browser/resources/ntp4/apps_page.js
[modify] https://crrev.com/a1dbafbd845d0e5f33848327b2562f818a616acd/chrome/browser/resources/ntp4/new_tab.html
[modify] https://crrev.com/a1dbafbd845d0e5f33848327b2562f818a616acd/chrome/browser/resources/ntp4/new_tab.js
[modify] https://crrev.com/a1dbafbd845d0e5f33848327b2562f818a616acd/chrome/browser/resources/ntp4/page_list_view.js
[modify] https://crrev.com/a1dbafbd845d0e5f33848327b2562f818a616acd/chrome/browser/ui/BUILD.gn
[modify] https://crrev.com/a1dbafbd845d0e5f33848327b2562f818a616acd/chrome/browser/ui/webui/app_launcher_page_ui.cc
[add] https://crrev.com/a1dbafbd845d0e5f33848327b2562f818a616acd/chrome/browser/ui/webui/ntp/app_icon_webui_handler.cc
[add] https://crrev.com/a1dbafbd845d0e5f33848327b2562f818a616acd/chrome/browser/ui/webui/ntp/app_icon_webui_handler.h
[modify] https://crrev.com/a1dbafbd845d0e5f33848327b2562f818a616acd/chrome/browser/ui/webui/ntp/app_launcher_handler.cc

As per c#8, it seems like this case was introduced in M57 (eg. not new with M60), can you confirm?
maybe too late for merge to M61 but feel free to merge-request for evaluation 

the original report and comment 1 are probably different bugs, I don't know why they got lumped together. Comment 1 is what's been fixed and yes, it will have been present for several milestones. I don't think it's urgent to merge since it took us a while to realize it.

The bug that corresponds to the original report might still stand, who knows. I don't know who's in charge of packaging chromeos default apps.

In addition to the apps listed in #3, 
Google Play books
Google Play movies & TV are shown with default icon.

On trying to open such app, app remains in loading state on the shelf forever. Attached the screenshot.

Deleted: Screenshot 2017-09-21 at 12.44.15 PM.png 3.2 MB

	Screenshot 2017-09-21 at 12.44.15 PM.png 3.2 MB View Download

Also saw this for bookmark apps

+afakhry for default apps. This one is probably long obsolete.

Let's close this because launcher has changed, and must be a newer bug if this is still a problem.