The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/32bbd5cfe72d1a3b9b93f1aca62af6b801da2d03

commit 32bbd5cfe72d1a3b9b93f1aca62af6b801da2d03
Author: Christos Froussios <cfroussios@chromium.org>
Date: Fri May 11 19:27:03 2018

[Password Manager] Inline the Export Passwords feature in the MD settings

The feature is now fully rolled out.

Bug:  838789 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Icdd315779899230fe78b7d90a17680736722a2ea
Reviewed-on: https://chromium-review.googlesource.com/1047867
Commit-Queue: Christos Froussios <cfroussios@chromium.org>
Reviewed-by: Hector Carmona <hcarmona@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557976}
[modify] https://crrev.com/32bbd5cfe72d1a3b9b93f1aca62af6b801da2d03/chrome/browser/resources/settings/passwords_and_forms_page/passwords_section.js
[modify] https://crrev.com/32bbd5cfe72d1a3b9b93f1aca62af6b801da2d03/chrome/browser/ui/webui/settings/md_settings_ui.cc

 Issue 824069  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1bb2133bb40b484b0a63d625a93a507342c87ed0

commit 1bb2133bb40b484b0a63d625a93a507342c87ed0
Author: Vaclav Brozek <vabr@chromium.org>
Date: Fri Aug 31 20:43:27 2018

Remove password export flag on Android

The feature has been enabled in stable releases for a number of
versions by now, hence the flag can be safely removed.

Bug:  838789 
Change-Id: I172df59564d881c8c7b6b5cad3b49d0971fc0251
Reviewed-on: https://chromium-review.googlesource.com/1195489
Commit-Queue: Vaclav Brozek <vabr@chromium.org>
Reviewed-by: Friedrich Horschig [CEST] <fhorschig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#588156}
[modify] https://crrev.com/1bb2133bb40b484b0a63d625a93a507342c87ed0/chrome/android/java/src/org/chromium/chrome/browser/preferences/password/ExportFlow.java
[modify] https://crrev.com/1bb2133bb40b484b0a63d625a93a507342c87ed0/chrome/android/javatests/src/org/chromium/chrome/browser/preferences/password/SavePasswordsPreferencesTest.java
[modify] https://crrev.com/1bb2133bb40b484b0a63d625a93a507342c87ed0/chrome/browser/about_flags.cc
[modify] https://crrev.com/1bb2133bb40b484b0a63d625a93a507342c87ed0/chrome/browser/android/chrome_feature_list.cc
[modify] https://crrev.com/1bb2133bb40b484b0a63d625a93a507342c87ed0/chrome/browser/flag_descriptions.cc
[modify] https://crrev.com/1bb2133bb40b484b0a63d625a93a507342c87ed0/chrome/browser/flag_descriptions.h

Now that the flag was removed on desktop and Android, the last platform to clean-up is iOS.
Over to you, ioanap@ :).

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/afdfb291c7484c71125fe6bd773eb143e1428028

commit afdfb291c7484c71125fe6bd773eb143e1428028
Author: Ioana Pandele <ioanap@chromium.org>
Date: Thu Sep 06 16:07:37 2018

Remove password export feature flag

This feature has been enabled for the past few stable releases, so the
flag is not needed anymore.

Bug:  838789 , 792840
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: Ib79921d30792dbd8e03fd2ec7652c15a76e84b73
Reviewed-on: https://chromium-review.googlesource.com/1203956
Reviewed-by: Vaclav Brozek <vabr@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Ioana Pandele <ioanap@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589182}
[modify] https://crrev.com/afdfb291c7484c71125fe6bd773eb143e1428028/components/password_manager/core/common/password_manager_features.cc
[modify] https://crrev.com/afdfb291c7484c71125fe6bd773eb143e1428028/components/password_manager/core/common/password_manager_features.h
[modify] https://crrev.com/afdfb291c7484c71125fe6bd773eb143e1428028/ios/chrome/app/main_controller.mm
[modify] https://crrev.com/afdfb291c7484c71125fe6bd773eb143e1428028/ios/chrome/browser/about_flags.mm
[modify] https://crrev.com/afdfb291c7484c71125fe6bd773eb143e1428028/ios/chrome/browser/ios_chrome_flag_descriptions.cc
[modify] https://crrev.com/afdfb291c7484c71125fe6bd773eb143e1428028/ios/chrome/browser/ios_chrome_flag_descriptions.h
[modify] https://crrev.com/afdfb291c7484c71125fe6bd773eb143e1428028/ios/chrome/browser/ui/settings/passwords_settings_egtest.mm
[modify] https://crrev.com/afdfb291c7484c71125fe6bd773eb143e1428028/ios/chrome/browser/ui/settings/save_passwords_collection_view_controller.mm
[modify] https://crrev.com/afdfb291c7484c71125fe6bd773eb143e1428028/ios/chrome/browser/ui/settings/save_passwords_collection_view_controller_unittest.mm

Thanks, ioanap@!
AFAIK, this all done, so marking as such. Please reopen if you disagree.