Yes. cr-dialog fires a 'close' event instead, so 'iron-overlay-closed' in that line should be renamed. See example usages at [1]

[1] https://cs.chromium.org/search/?q=%22on-close%3D%22+file:%5Esrc/chrome/browser/resources/settings/+package:%5Echromium$&type=cs

I meant <dialog> fires a 'close' event (cr-dialog also fires it, but it is not relevant in this case).

Thanks dpapad@! Just renaming 'iron-overlay-closed' to 'close' seems to work for our case.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e07ad2c4c76baf7ea1f4489a0dc067d7962a316e

commit e07ad2c4c76baf7ea1f4489a0dc067d7962a316e
Author: Klemen Kozjek <klemenko@google.com>
Date: Mon Jul 24 06:06:23 2017

Files app: Return focus to the files list when quick view closes

As a result, files that were selected before quick view opened will regain focus after the quick view dialog closes.

Bug:  747230 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ida4bcd1a9b1578a78da5c451522eaf43c675b0d2
Reviewed-on: https://chromium-review.googlesource.com/582251
Reviewed-by: Naoki Fukino <fukino@chromium.org>
Commit-Queue: Klemen Kozjek <klemenko@google.com>
Cr-Commit-Position: refs/heads/master@{#488921}
[modify] https://crrev.com/e07ad2c4c76baf7ea1f4489a0dc067d7962a316e/ui/file_manager/file_manager/foreground/elements/files_quick_view.js
[modify] https://crrev.com/e07ad2c4c76baf7ea1f4489a0dc067d7962a316e/ui/file_manager/file_manager/foreground/js/quick_view_controller.js

Your change meets the bar and is auto-approved for M61. Please go ahead and merge the CL to branch 3163 manually. Please contact milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), ketakid @(ChromeOS), govind@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

 Issue 748599  has been merged into this issue.

This problem is still prevalent on M61 Dev build (9765.9.0, 61.0.3163.16), but fixed on M62 dev build (9784.0.0, 62.0.3166.0).

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2488bacd4b2c0ff7a20b468439896d8686d05d95

commit 2488bacd4b2c0ff7a20b468439896d8686d05d95
Author: Tatsuhisa Yamaguchi <yamaguchi@chromium.org>
Date: Mon Jul 31 05:59:48 2017

Files app: Return focus to the files list when quick view closes

As a result, files that were selected before quick view opened will regain focus after the quick view dialog closes.

TBR=klemenko@google.com

(cherry picked from commit e07ad2c4c76baf7ea1f4489a0dc067d7962a316e)

Bug:  747230 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ida4bcd1a9b1578a78da5c451522eaf43c675b0d2
Reviewed-on: https://chromium-review.googlesource.com/582251
Reviewed-by: Naoki Fukino <fukino@chromium.org>
Commit-Queue: Klemen Kozjek <klemenko@google.com>
Cr-Original-Commit-Position: refs/heads/master@{#488921}
Reviewed-on: https://chromium-review.googlesource.com/593380
Reviewed-by: Tatsuhisa Yamaguchi <yamaguchi@chromium.org>
Cr-Commit-Position: refs/branch-heads/3163@{#139}
Cr-Branched-From: ff259bab28b35d242e10186cd63af7ed404fae0d-refs/heads/master@{#488528}
[modify] https://crrev.com/2488bacd4b2c0ff7a20b468439896d8686d05d95/ui/file_manager/file_manager/foreground/elements/files_quick_view.js
[modify] https://crrev.com/2488bacd4b2c0ff7a20b468439896d8686d05d95/ui/file_manager/file_manager/foreground/js/quick_view_controller.js

Verified on M61 (Chrome OS 9765.16.0, 61.0.3163.30 dev build).