Comment #10 on issue 242284 by
hs...@chromium.org: ChromeOS: New dialog
While you're at it, can you replace the CreateWindowWithParent in
extension_uninstall_dialog_view.cc: ExtensionUninstallDialogViews::Show()
with views::DialogDelegate::CreateDialogWidget() too? (it is shown in the
screenshot #1, somehow it does not go through the ShowMessageBox path).
For the long title, the only one I can find (see screenshot #2) is the
WebRTC screencast confirmation dialog, but it is behind a flag. (You'll
need to enable "enable-usermedia-screen-capture" in about://flags, then
open a WebRTC screencast test page, like
https://www.corp.google.com/~hshi/webrtc/screen.html). It might be easier
if you just subsitute a long title when debugging.