The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/304bca03503f89c8c671c10f36d9b8985af36918

commit 304bca03503f89c8c671c10f36d9b8985af36918
Author: Tarun Bansal <tbansal@chromium.org>
Date: Wed Nov 14 18:56:49 2018

Enable media holdback experiment by default

Change-Id: Ibbdd75e179458b401f2e5ff3a61a415865769351
Bug:  905095 
Reviewed-on: https://chromium-review.googlesource.com/c/1335274
Reviewed-by: rajendrant <rajendrant@chromium.org>
Commit-Queue: Tarun Bansal <tbansal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608065}
[modify] https://crrev.com/304bca03503f89c8c671c10f36d9b8985af36918/chrome/browser/chrome_content_browser_client.cc

The CL in comment#2 is past feature freeze, so I think it'd be best to aim for M73 on this.

M-73 seems reasonable. By default, the Chromium code in M-72 already removes the interaction between data saver and autoplay. There are still some code cleanups to do, but they can go in M-73.

Is there a reason for this to be RVG?

Just for our own record (saw this in some other code review): We would also need to remove IDS_WEBSITE_SETTINGS_CATEGORY_AUTOPLAY_DISABLED_DATA_SAVER (and related site settings code) as part of this cleanup.

Issue 649784 has been merged into this issue.

 Issue 898096  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14

commit 0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14
Author: Robert Ogden <robertogden@chromium.org>
Date: Wed Dec 12 22:41:29 2018

Remove DataSaver and Autoplay+Preload Integration

This feature breaks pages and doesn't help users save much data
anymore. See bug for more detail.

This CL removes all references to the integration in UMA, Blink,
WebPrefs, and the Android UI.

Bug:  905095 
Change-Id: Id6a6a149ffa98f461c892948d5570e5543973ae8
Reviewed-on: https://chromium-review.googlesource.com/c/1363790
Commit-Queue: Robert Ogden <robertogden@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616089}
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/chrome/android/java/src/org/chromium/chrome/browser/preferences/website/ContentSettingsResources.java
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/chrome/android/java/src/org/chromium/chrome/browser/preferences/website/SiteSettingsPreferences.java
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/chrome/android/java/strings/android_chrome_strings.grd
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/chrome/browser/chrome_content_browser_client.cc
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/content/public/common/common_param_traits_macros.h
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/content/public/common/web_preferences.cc
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/content/public/common/web_preferences.h
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/content/renderer/render_view_impl.cc
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/third_party/blink/public/web/web_settings.h
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/third_party/blink/renderer/core/exported/web_settings_impl.cc
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/third_party/blink/renderer/core/exported/web_settings_impl.h
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/third_party/blink/renderer/core/frame/settings.json5
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/third_party/blink/renderer/core/html/media/autoplay_policy.cc
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/third_party/blink/renderer/core/html/media/autoplay_uma_helper.cc
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/third_party/blink/renderer/core/html/media/autoplay_uma_helper.h
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/third_party/blink/renderer/core/html/media/html_media_element.cc
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/third_party/blink/web_tests/http/tests/media/preload-conditions.html
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/third_party/blink/web_tests/media/autoplay-muted-conditions.html
[delete] https://crrev.com/60e52e75f2d89746fc05880b57708b3d8c352aa6/third_party/blink/web_tests/media/autoplay-muted-datasaver-off.html
[delete] https://crrev.com/60e52e75f2d89746fc05880b57708b3d8c352aa6/third_party/blink/web_tests/media/autoplay-muted-datasaver-on-holdback-on.html
[delete] https://crrev.com/60e52e75f2d89746fc05880b57708b3d8c352aa6/third_party/blink/web_tests/media/autoplay-muted-datasaver-on.html
[modify] https://crrev.com/0dc6e0ae892c12a0c3a3a59c746b5fe83b2e2b14/tools/metrics/histograms/enums.xml