+hcarmona@ - This appears to be a side effect of:
https://chromium-review.googlesource.com/1015644

It appears that value="{{value::input}}" is not working as expected when wrapped in an <iron-input>. Specifically, |value| is not showing up in the <input> value.

I'll see if I can figure out why, but any thoughts or suggestions would be appreciated.

It looks like a bunch of places in the network config UI are currently broken.

Looks like we need to use bind-value in iron-input:

https://www.webcomponents.org/element/PolymerElements/iron-input

@stevenjb: Does the fix basically look like the follwing (from the same CL you linked)?

https://chromium-review.googlesource.com/c/chromium/src/+/1015644/21/chrome/browser/resources/pdf/elements/viewer-page-selector/viewer-page-selector.html

Yes. I did a (quickish) audit and it appears that bind-value was only missing from the cr_components/network changes.

Also, I discovered that value="{{value::input}}" is only required in the <input> element where 'input' events are required. i.e. normally value="{{value}}" can be omitted from the <input> element.

CL FYI: https://chromium-review.googlesource.com/c/chromium/src/+/1067840

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d286b4041c978e38b8c5618f2212611ce9337a71

commit d286b4041c978e38b8c5618f2212611ce9337a71
Author: Steven Bennetts <stevenjb@chromium.org>
Date: Mon May 21 22:39:20 2018

Settings: Network: Fix inputs for polymer2

The Polymer2 conversion of iron-input broke network config inputs:
https://chromium-review.googlesource.com/c/chromium/src/+/1015644

This fixes them by using bind-value as described here:
https://www.webcomponents.org/element/PolymerElements/iron-input

Bug:  844259 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I8ccc88d003cd04fca56eb2d86e2bc69654d7c896
Reviewed-on: https://chromium-review.googlesource.com/1067840
Reviewed-by: Hector Carmona <hcarmona@chromium.org>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#560384}
[modify] https://crrev.com/d286b4041c978e38b8c5618f2212611ce9337a71/ui/webui/resources/cr_components/chromeos/network/network_config_input.html
[modify] https://crrev.com/d286b4041c978e38b8c5618f2212611ce9337a71/ui/webui/resources/cr_components/chromeos/network/network_nameservers.html
[modify] https://crrev.com/d286b4041c978e38b8c5618f2212611ce9337a71/ui/webui/resources/cr_components/chromeos/network/network_property_list.html
[modify] https://crrev.com/d286b4041c978e38b8c5618f2212611ce9337a71/ui/webui/resources/cr_components/chromeos/network/network_proxy.html
[modify] https://crrev.com/d286b4041c978e38b8c5618f2212611ce9337a71/ui/webui/resources/cr_components/chromeos/network/network_proxy_input.html

The primary issue should be fixed in the next update.

There was a question about how macro expansion should be handled in the email thread (visible in the 67.0 screenshot), but that should be addressed as a separate issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/48ab25f7683632b99e21ba42b0f6e29b85857bef

commit 48ab25f7683632b99e21ba42b0f6e29b85857bef
Author: Steven Bennetts <stevenjb@chromium.org>
Date: Fri May 25 01:18:30 2018

Fix internet dialog styling for Polymer2

This moves the paper-input-container styling to the network components
so that it applies consistently in Settings and in dialogs.

It also includes some other minor fixes and adds styling to each
dialog to match Settings (primarily for line-height).

Bug:  844259 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ice417ced7cd3758c8270cfc00a221aa4b15fe466
Reviewed-on: https://chromium-review.googlesource.com/1072235
Reviewed-by: Hector Carmona <hcarmona@chromium.org>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#561722}
[modify] https://crrev.com/48ab25f7683632b99e21ba42b0f6e29b85857bef/chrome/browser/resources/chromeos/bluetooth_pairing_dialog/bluetooth_pairing_dialog.html
[modify] https://crrev.com/48ab25f7683632b99e21ba42b0f6e29b85857bef/chrome/browser/resources/chromeos/internet_config_dialog/internet_config_dialog.html
[modify] https://crrev.com/48ab25f7683632b99e21ba42b0f6e29b85857bef/chrome/browser/resources/chromeos/internet_detail_dialog/internet_detail_dialog.html
[modify] https://crrev.com/48ab25f7683632b99e21ba42b0f6e29b85857bef/chrome/browser/resources/settings/internet_page/internet_shared_css.html
[modify] https://crrev.com/48ab25f7683632b99e21ba42b0f6e29b85857bef/chrome/browser/resources/settings/settings_ui/settings_ui.html
[modify] https://crrev.com/48ab25f7683632b99e21ba42b0f6e29b85857bef/ui/webui/resources/cr_components/chromeos/network/network_nameservers.html
[modify] https://crrev.com/48ab25f7683632b99e21ba42b0f6e29b85857bef/ui/webui/resources/cr_components/chromeos/network/network_property_list.html
[modify] https://crrev.com/48ab25f7683632b99e21ba42b0f6e29b85857bef/ui/webui/resources/cr_components/chromeos/network/network_proxy_input.html
[modify] https://crrev.com/48ab25f7683632b99e21ba42b0f6e29b85857bef/ui/webui/resources/cr_components/chromeos/network/network_shared_css.html
[modify] https://crrev.com/48ab25f7683632b99e21ba42b0f6e29b85857bef/ui/webui/resources/cr_elements/shared_vars_css.html

Assuming that 68 branched before this landed.

Oops, the patch in comment #10 was supposed to be for  issue 845126 . Copy/pasting.

Verified fixed in M68.0.3440.9 10718.7.0 dev paine.  The configured credentials are now displayed as expected.