A few options I can think of:

1) I like the styling in the suggested mock, but I'm worried it's taking up too much space. Maybe we could put it inside a scrollbox so that we can cap its height?

2) Have a "View reported settings" link that takes the user to a new tab containing only the information.

3) A more significant change would be to consider making this dialog into a sub-page. Then these properties could perhaps follow a similar style to About CrOS [1]

[1] https://folio.googleplex.com/chrome-ux-specs-and-sources/Chrome%20Inner%20Pages/03-Settings/preview/cards#%2FPREVIEW-About_ChromeOS.png%3Fz=half

Alan, what do you think?

I'll let Alan speak on what is better UX-wise, I'll just comment on the estimated amount of work required for options 1,2,3 mentioned by @tbuckley.

1) Adding a max height and using a scroll-bar if necessary sounds the easiest option to implement.

2) Alan had mentioned this option in the past along with a similar option of clicking on a button that prompts the user to download the reported settings in a txt file. Either of those seem more complex than solution 1 above.

3) Modifying the dialog to a subpage seems more costly than both 1 and 2, and also might feel a bit odd on ChromeOS, where the "powerwash" functionality will still  be exposed as a dialog but the "reset settings" as a subpage.

I prefer option 2, surfacing the data un-styled and in a separate tab

1.) Although technically easier, this is a really bad experience, dedicating a lot of real estate for relatively insignificant information 

3.) Again, don't think this information is worthy of a sub-page.  

Thanks Alan, will move forward with option 2.

@dbeam: I looked up whether extensions can read the contents of "about:blank" and it seems that they can't. Can you verify? Otherwise displaying the reset settings info in a new tab might be exposing such info.

dpapad@/#c6: depends on whether chrome://flags/#extensions-on-chrome-urls is enabled, I'd guess

@6 Extensions about:blank access is funny.  In most cases, we try to follow the web model, where an extension can access an about:blank frame if it can access the opener of that frame.  So you'll probably be okay if the opener is a chrome settings page (unless, as dbeam@ points out, extensions are allowed to act on chrome urls).  All that said, it'd probably be nicer to just have some chrome url associated with chrome info, IMO.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c740e34d19834b978e7f6cfc91ec1d07b5e64b03

commit c740e34d19834b978e7f6cfc91ec1d07b5e64b03
Author: dpapad <dpapad@chromium.org>
Date: Thu Apr 21 18:11:27 2016

MD Settings: Reset profile dialog, display settings in new tab.

BUG= 603709 , 604624 

Review URL: https://codereview.chromium.org/1911573003

Cr-Commit-Position: refs/heads/master@{#388814}

[modify] https://crrev.com/c740e34d19834b978e7f6cfc91ec1d07b5e64b03/chrome/browser/resources/settings/reset_page/reset_browser_proxy.js
[modify] https://crrev.com/c740e34d19834b978e7f6cfc91ec1d07b5e64b03/chrome/browser/resources/settings/reset_page/reset_profile_dialog.html
[modify] https://crrev.com/c740e34d19834b978e7f6cfc91ec1d07b5e64b03/chrome/browser/resources/settings/reset_page/reset_profile_dialog.js
[modify] https://crrev.com/c740e34d19834b978e7f6cfc91ec1d07b5e64b03/chrome/browser/ui/webui/settings/reset_settings_handler.cc
[modify] https://crrev.com/c740e34d19834b978e7f6cfc91ec1d07b5e64b03/chrome/browser/ui/webui/settings/reset_settings_handler.h
[modify] https://crrev.com/c740e34d19834b978e7f6cfc91ec1d07b5e64b03/chrome/test/data/webui/settings/reset_page_test.js

@bettes: Please verify that this issue is addressed. See screenshots at http://imgur.com/a/LbWBS. Clicking on the question mark icon triggers the new tab to open.

Thanks Demetrios! A couple requests:

1) Replace the (?) icon with a link reading "View reported settings". So it should be "Help make Chromium better by reporting the current settings. [View reported settings]". We're trying to only use the (?) icon for tooltips.

2) Less JSON-y formatting on the page that's opened. Eg:
Locale: en-US
User Agent: ...
Chromium: ...
Startup URLs: md-settings
...
Extensions: Web Store, Bookmark Manager, Settings, ...

@tbuckley: Does http://imgur.com/a/bJgmu look OK?

The only caveat is that some text overflows to the right (which was not happening with the JSON approach), but I think this is not a real issue, this UI is not meant to be styled anyway (per comment#5).

Looks good to me!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/cfc480b7040cddca093748c383ea1c3299d9088f

commit cfc480b7040cddca093748c383ea1c3299d9088f
Author: dpapad <dpapad@chromium.org>
Date: Mon Apr 25 22:18:56 2016

MD Settings: Tweak "View reported settings" UI in reset settings profile.

BUG= 603709 

Review URL: https://codereview.chromium.org/1911943002

Cr-Commit-Position: refs/heads/master@{#389581}

[modify] https://crrev.com/cfc480b7040cddca093748c383ea1c3299d9088f/chrome/app/settings_chromium_strings.grdp
[modify] https://crrev.com/cfc480b7040cddca093748c383ea1c3299d9088f/chrome/app/settings_google_chrome_strings.grdp
[modify] https://crrev.com/cfc480b7040cddca093748c383ea1c3299d9088f/chrome/app/settings_strings.grdp
[modify] https://crrev.com/cfc480b7040cddca093748c383ea1c3299d9088f/chrome/browser/resources/settings/reset_page/reset_profile_dialog.html
[modify] https://crrev.com/cfc480b7040cddca093748c383ea1c3299d9088f/chrome/browser/resources/settings/reset_page/reset_profile_dialog.js
[modify] https://crrev.com/cfc480b7040cddca093748c383ea1c3299d9088f/chrome/browser/resources/settings/search_engines_page/search_engines_page.html
[modify] https://crrev.com/cfc480b7040cddca093748c383ea1c3299d9088f/chrome/browser/ui/webui/settings/md_settings_localized_strings_provider.cc
[modify] https://crrev.com/cfc480b7040cddca093748c383ea1c3299d9088f/chrome/test/data/webui/settings/reset_page_test.js