The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ff56c0909be1a23d43a31ba9acb45964cd1a3256

commit ff56c0909be1a23d43a31ba9acb45964cd1a3256
Author: mlamouri <mlamouri@chromium.org>
Date: Thu May 11 15:31:39 2017

Rename --enable-default-media-session to --enable-audio-focus.

The flag matches reality and will allow to introduce a flag that will
enable the MediaSession code without turning on the audio focus
behaviour.

BUG= 719968 
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2871583004
Cr-Commit-Position: refs/heads/master@{#470965}

[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/chrome/browser/about_flags.cc
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/chrome/browser/chromeos/accessibility/accessibility_manager.cc
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/chrome/browser/flag_descriptions.cc
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/chrome/browser/flag_descriptions.h
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/chrome/browser/resources/chromeos/chromevox/chromevox/background/options.js
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/chrome/browser/resources/chromeos/chromevox/cvox2/background/media_automation_handler.js
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/chromecast/browser/cast_browser_main_parts.cc
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/content/browser/media/session/audio_focus_delegate_default.cc
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/content/browser/media/session/audio_focus_delegate_default_browsertest.cc
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/content/browser/media/session/audio_focus_manager_unittest.cc
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/content/browser/media/session/media_session_controllers_manager.cc
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/content/browser/media/session/media_session_impl_visibility_browsertest.cc
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/content/browser/media/session/pepper_playback_observer.cc
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/content/browser/media/session/pepper_player_delegate.cc
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/media/base/media_switches.cc
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/media/base/media_switches.h
[modify] https://crrev.com/ff56c0909be1a23d43a31ba9acb45964cd1a3256/tools/metrics/histograms/enums.xml

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d967040c162c7fb64299cd623f246da739962c38

commit d967040c162c7fb64299cd623f246da739962c38
Author: mlamouri <mlamouri@chromium.org>
Date: Tue May 16 10:22:58 2017

Add --enable-internal-media-session to trigger the MediaSession backend.

This flag should be used by embedders that want to use the content::MediaSession
on platform on which it is not enabled by default.

BUG= 719968 

Review-Url: https://codereview.chromium.org/2873983002
Cr-Commit-Position: refs/heads/master@{#472058}

[add] https://crrev.com/d967040c162c7fb64299cd623f246da739962c38/content/browser/media/session/media_session_browsertest.cc
[modify] https://crrev.com/d967040c162c7fb64299cd623f246da739962c38/content/browser/media/session/media_session_controllers_manager.cc
[modify] https://crrev.com/d967040c162c7fb64299cd623f246da739962c38/content/test/BUILD.gn
[modify] https://crrev.com/d967040c162c7fb64299cd623f246da739962c38/media/base/media_switches.cc
[modify] https://crrev.com/d967040c162c7fb64299cd623f246da739962c38/media/base/media_switches.h