@dbeam who could take this on? Marked as Pri-1 since it is missing functionality.

See also  Issue 460379 

tommycli@ loves obscure things from old options

Yeah, love this stuff <3

bettes, tbuckley:

You guys have a specific UI in mind?

Maybe just a Settings row with the message:

"You have chosen to open certain file types automatically after downloading." (same as Options) with a Clear button on the right? 

And the whole row is hidden when there's no auto-open file types?

This would be the same format as the first row in People and Appearance.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b8ab8bd804ea8206e8f11ed10c6ea93a9b0dffcf

commit b8ab8bd804ea8206e8f11ed10c6ea93a9b0dffcf
Author: tommycli <tommycli@chromium.org>
Date: Sat Feb 25 01:17:47 2017

MD Settings: Add "Auto Open" setting to Downloads C++ handler.

BUG= 692662 

Review-Url: https://codereview.chromium.org/2711823002
Cr-Commit-Position: refs/heads/master@{#453035}

[modify] https://crrev.com/b8ab8bd804ea8206e8f11ed10c6ea93a9b0dffcf/chrome/browser/ui/webui/settings/downloads_handler.cc
[modify] https://crrev.com/b8ab8bd804ea8206e8f11ed10c6ea93a9b0dffcf/chrome/browser/ui/webui/settings/downloads_handler.h
[add] https://crrev.com/b8ab8bd804ea8206e8f11ed10c6ea93a9b0dffcf/chrome/browser/ui/webui/settings/downloads_handler_unittest.cc
[modify] https://crrev.com/b8ab8bd804ea8206e8f11ed10c6ea93a9b0dffcf/chrome/browser/ui/webui/settings/md_settings_ui.cc
[modify] https://crrev.com/b8ab8bd804ea8206e8f11ed10c6ea93a9b0dffcf/chrome/test/BUILD.gn

@tommycli the UI from #5 sounds good, thanks!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/915915168110d5bc831be6bfdae58a106f1a3cfe

commit 915915168110d5bc831be6bfdae58a106f1a3cfe
Author: tommycli <tommycli@chromium.org>
Date: Tue Feb 28 21:31:42 2017

MD Settings: Add "Auto Open" setting to Downloads page UI.

BUG= 692662 
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2713343003
Cr-Commit-Position: refs/heads/master@{#453707}

[modify] https://crrev.com/915915168110d5bc831be6bfdae58a106f1a3cfe/chrome/app/settings_strings.grdp
[modify] https://crrev.com/915915168110d5bc831be6bfdae58a106f1a3cfe/chrome/browser/resources/settings/downloads_page/compiled_resources2.gyp
[add] https://crrev.com/915915168110d5bc831be6bfdae58a106f1a3cfe/chrome/browser/resources/settings/downloads_page/downloads_browser_proxy.html
[add] https://crrev.com/915915168110d5bc831be6bfdae58a106f1a3cfe/chrome/browser/resources/settings/downloads_page/downloads_browser_proxy.js
[modify] https://crrev.com/915915168110d5bc831be6bfdae58a106f1a3cfe/chrome/browser/resources/settings/downloads_page/downloads_page.html
[modify] https://crrev.com/915915168110d5bc831be6bfdae58a106f1a3cfe/chrome/browser/resources/settings/downloads_page/downloads_page.js
[modify] https://crrev.com/915915168110d5bc831be6bfdae58a106f1a3cfe/chrome/browser/resources/settings/settings_resources.grd
[modify] https://crrev.com/915915168110d5bc831be6bfdae58a106f1a3cfe/chrome/browser/ui/webui/settings/downloads_handler.cc
[modify] https://crrev.com/915915168110d5bc831be6bfdae58a106f1a3cfe/chrome/browser/ui/webui/settings/downloads_handler.h
[modify] https://crrev.com/915915168110d5bc831be6bfdae58a106f1a3cfe/chrome/browser/ui/webui/settings/md_settings_localized_strings_provider.cc
[modify] https://crrev.com/915915168110d5bc831be6bfdae58a106f1a3cfe/chrome/test/data/webui/settings/cr_settings_browsertest.js
[add] https://crrev.com/915915168110d5bc831be6bfdae58a106f1a3cfe/chrome/test/data/webui/settings/downloads_page_test.js