Contact emailselada...@chromium.org

Explainer
https://docs.google.com/document/d/1q3oGy7hLJmdQA4ZK7QG7DnwgtcpL6oB2pqLQJ6MP1tY/edit?usp=sharing

Specificationhttps://github.com/w3c/mediacapture-screen-share/pull/222/files

Summary

Hint indicating to the user agent whether the application, upon calling
getDisplayMedia() with {audio: true} or similar, wishes *system audio* to
be offered to the user. (If not - only offer tab-audio.)


Blink componentBlink
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink>

TAG reviewN/A. This is just an addition of a single flag to an existing
dictionary, following well-known patterns.

TAG review statusNot applicable

Risks


Interoperability and Compatibility

*Gecko*: Positive (https://github.com/mozilla/standards-positions/issues/638)
Jan-Ivar Bruaroey from Mozilla, and Youenn Fablet from Apple, have both
collaborated with us closely in shaping this PR. They have then approved
merging this PR into w3c/mediacapture-screen-share. This is implicit
support, so I'd consider it POSITIVE even though, as of the time of this
writing, the official request for position has not yet been answered.

*WebKit*: Positive (
https://lists.webkit.org/pipermail/webkit-dev/2022-May/032247.html)
Jan-Ivar Bruaroey from Mozilla, and Youenn Fablet from Apple, have both
collaborated with us closely in shaping this PR. They have then approved
merging this PR into w3c/mediacapture-screen-share. This is implicit
support, so I'd consider it POSITIVE even though, as of the time of this
writing, the official request for position has not yet been answered.

*Web developers*: Positive Endorsed by Google Meet.

Security

This feature can only be used by Web applications to REDUCE the amount of
private information they obtain from the user. As such, this is a net
security gain.



Debuggability

N/A


Will this feature be supported on all six Blink platforms (Windows, Mac,
Linux, Chrome OS, Android, and Android WebView)?No. Supported on all
platforms that support getDisplayMedia. (Namely, all desktop platforms.)


Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
?No

Tracking bughttps://bugs.chromium.org/p/chromium/issues/detail?id=1329129

Estimated milestones

No milestones specified



Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/4649448880734208

Links to previous Intent discussionsIntent to prototype:
https://groups.google.com/a/chromium.org/g/blink-dev/c/zUJh3aXAC3k

This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.

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