Hi, this is entirely for process reasons. The origin trial needs to be 
alive until (including) M136 to allow developers to move to isolated web 
apps. Can I formally keep the drive-by web OT alive while launching the IWA 
version now? If so, I am happy to launch this earlier.

On Wednesday, October 2, 2024 at 5:53:13 PM UTC+2 sligh...@chromium.org 
wrote:

> Hey, going back through the timelines here, it's worrying that this 
> feature isn't going to ship until 137. The OT isn't particularly 
> problematic as you're going to ship the same API shape, but the duration of 
> this whole thing is worrying. Why isn't this going to launch in 131?
>
> On Wednesday, October 2, 2024 at 8:50:47 AM UTC-7 Alex Russell wrote:
>
>> LGTM
>>
>> On Wednesday, September 18, 2024 at 8:44:12 AM UTC-7 sim...@google.com 
>> wrote:
>>
>>> Contact emails
>>>
>>> sim...@google.com, swetha...@google.com
>>>
>>> Explainer
>>>
>>> https://github.com/screen-share/capture-all-screens/blob/main/README.md
>>>
>>> Specification
>>>
>>> https://screen-share.github.io/capture-all-screens
>>>
>>> Design docs
>>>
>>> https://screen-share.github.io/capture-all-screens
>>>
>>> https://github.com/screen-share/capture-all-screens/blob/main/README.md
>>>
>>>
>>> https://docs.google.com/document/d/1XB8rQRnY5N8G2PeEcNJpVO0q22CutvwW8GGKCZ1z_vc/edit?usp=sharing
>>>
>>> Summary
>>>
>>> Capture all the screens currently connected to the device using 
>>> getAllScreensMedia().
>>>
>>> Calling getDisplayMedia() multiple times requires multiple user 
>>> gestures, with the user manually selecting the next screen each time, and 
>>> without a guarantee to the app that all screens were selected. 
>>> getAllScreensMedia() improves on all of these fronts.
>>>
>>> (As this feature has extreme privacy ramifications, it is only exposed 
>>> behind an enterprise policy, and users are warned before recording even 
>>> starts, that recording *could* start at some point.)
>>>
>>>
>>> Blink component
>>>
>>> Blink>Media>GetAllScreensMedia 
>>> <https://g-issues.chromium.org/components/1637013>
>>>
>>> TAG review
>>>
>>> https://github.com/w3ctag/design-reviews/issues/856
>>>
>>> TAG review status
>>>
>>> TAG has expressed concerns about exposing such a powerful capability on 
>>> the web. We mitigate their concerns by moving the API to Isolated Web Apps 
>>> and only exposing it to apps that are explicitly allowlisted by the device 
>>> owner.
>>>
>>> Chromium Trial Name
>>>
>>> GetAllScreensMedia
>>>
>>> Link to origin trial feedback summary
>>>
>>> https://github.com/screen-share/capture-all-screens/issues
>>>
>>> Origin Trial documentation link
>>>
>>> https://github.com/screen-share/capture-all-screens
>>>
>>> Risks
>>>
>>> Interoperability and Compatibility
>>>
>>> This API is only available to origins allowlisted by administrators 
>>> through a policy. The policy itself is non-standard, limiting even 
>>> theoretical interoperability. This API rejects requests from pages that are 
>>> not allowlisted by an administrator. The likelihood of this API being 
>>> adopted by a browser that does not provide administrators mechanisms to 
>>> manage clients is low.
>>>
>>>
>>> Gecko: N/A - given that the API is limited to managed configurations, 
>>> it's not clear that requesting a position is needed
>>>
>>> WebKit: N/A - given that the API is limited to managed configurations, 
>>> it's not clear that requesting a position is needed
>>>
>>> Web developers: Positive (
>>> https://github.com/screen-share/capture-all-screens/issues/9)
>>>
>>> Other signals:
>>>
>>> Ergonomics
>>>
>>> No
>>>
>>>
>>> Activation
>>>
>>> The challenge for developers is the limitation of the API to origins 
>>> allowlisted by an enterprise policy.
>>>
>>>
>>> Security
>>>    
>>>    1. 
>>>    
>>>    Risk of malicious sites exploiting the API and gaining access to 
>>>    sensitive information on users' devices. This risk is mitigated by the 
>>> API 
>>>    only being accessible to origins allowlisted by an enterprise policy.
>>>    2. 
>>>    
>>>    Risk of an allowlisted site being compromised to gain access to 
>>>    sensitive information on users’ devices. This risk it mitigated by the 
>>> API 
>>>    only being accessible to Isolated Web Apps. 
>>>    3. 
>>>    
>>>    Risk of users loading private information that gets recorded and 
>>>    made available to apps affiliated with their device's admin. This risk 
>>> is 
>>>    mitigated by informing users that recording might start at any moment 
>>>    before the API becomes accessible. (In CrOS, this warning is delivered 
>>> in 
>>>    the log-in screen, and when users log-in despite the warning, this is 
>>>    tantamount to assent.)
>>>    4. 
>>>    
>>>    Risk of users forgetting that their screens are being recorded. This 
>>>    risk is mitigated through a persistent notification.
>>>    
>>>
>>>
>>> WebView application risks
>>>
>>> N/A (No change in behavior for existing APIs).
>>>
>>>
>>> Debuggability
>>>
>>> Reason this experiment is being extended
>>>
>>> This is needed to provide developers with enough time to pivot their 
>>> drive-by web solutions to isolated web app solutions. 
>>>
>>> We have made significant progress on the launch of `getAllScreensMedia` 
>>> for isolated web apps and as discussed here 
>>> <http://original%20intent%20to%20extend%20experiment>, this is a 
>>> requirement to extend the origin trial.
>>>
>>>
>>> Will this feature be supported on all six Blink platforms (Windows, Mac, 
>>> Linux, ChromeOS, Android, and Android WebView)?
>>>
>>> No
>>>
>>> This API is initially implemented on CrOS, where demand for it is 
>>> greatest, and where we have the most flexibility in offering users early 
>>> warning that their screens may be recorded if they proceed past the log-in 
>>> screen. Lessons learned from shipping this API on CrOS will be used when 
>>> deciding how to correctly implement such warnings on other platforms.
>>>
>>>
>>> Is this feature fully tested by web-platform-tests 
>>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
>>> ?
>>>
>>> No, as WPTs don’t support setting of managed policies. The API is tested 
>>> by a number of unit- and browser- tests (Test files 
>>> <https://source.chromium.org/search?q=getallscreensmedia%20f:test.cc%20-f:out%2F&sq=>
>>> ).
>>>
>>>
>>> DevTrial instructions
>>>
>>> https://github.com/screen-share/capture-all-screens/blob/main/HOWTO.md
>>>
>>> Flag name on chrome://flags
>>>
>>> chrome://flags#enable-get-all-screens-media
>>>
>>> Finch feature name
>>>
>>> GetAllScreensMedia
>>>
>>> Non-finch justification
>>>
>>> This feature is only available through active enabling by admin policy 
>>> and can be disabled the same way at any time.
>>>
>>> Requires code in //chrome?
>>>
>>> True
>>>
>>> Tracking bug
>>>
>>> https://issues.chromium.org/issues/40216442
>>>
>>> Launch bug
>>>
>>> https://launch.corp.google.com/launch/4276771
>>>
>>> Measurement
>>>
>>> As this is a managed feature, monthly active users can be measured and 
>>> are displayed at go/contact-center-dashboard (Googlers only).
>>>
>>> Availability expectation
>>>
>>> Feature is available only on ChromeOS for the foreseeable future.
>>>
>>> Adoption expectation
>>>
>>> We anticipate this feature being used by partners in the contact center 
>>> space (or other areas that have to comply with regulation or established 
>>> usage patterns that require screen capture).
>>>
>>> Adoption plan
>>>
>>> There is already a significant number of developers that are working on 
>>> integrating this feature in their products (beyond the developers that 
>>> expressed public interest here 
>>> <https://github.com/screen-share/capture-all-screens/issues/9>).
>>>
>>> Non-OSS dependencies
>>>
>>> At this time, this feature is only enabled through the Chrome admin 
>>> panel <https://admin.google.com/>.
>>>
>>> Sample links
>>>
>>> https://github.com/screen-share/capture-all-screens/blob/main/HOWTO.md
>>>
>>> https://github.com/screen-share/capture-all-screens/blob/main/README.md
>>>
>>> Estimated milestones
>>>
>>> Shipping on desktop
>>>
>>> 137
>>>
>>> Origin trial desktop first
>>>
>>> 118
>>>
>>> Origin trial desktop last
>>>
>>> 128
>>>
>>> Origin trial extension 1 end milestone
>>>
>>> 131
>>>
>>> Origin trial extension 2 end milestone
>>>
>>> 136
>>>
>>> DevTrial on desktop
>>>
>>> 116
>>>
>>> Note that we already have Blink owners approval to launch the API in 
>>> M137 (intent to ship 
>>> <https://groups.google.com/a/chromium.org/g/blink-dev/c/HtBrZ9r_ZHU/m/aLOIPyb9AQAJ>).
>>>  
>>> As discussed in the first intent to extend experiment 
>>> <https://groups.google.com/a/chromium.org/g/blink-dev/c/HErdlr3e_V0/m/usPZd66lAQAJ>,
>>>  
>>> we request this extension to (including) M136 in order to give developers 
>>> sufficient time to move from their drive-by web solutions to isolated web 
>>> app solutions.
>>>
>>> Anticipated spec changes
>>>
>>> No open issues and no anticipated changes.
>>>
>>> Link to entry on the Chrome Platform Status
>>>
>>> https://chromestatus.com/feature/6284029979525120?gate=5610053803966464
>>>
>>> Links to previous Intent discussions
>>>
>>> Intent to Prototype: 
>>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAEdDZo9N354i6eST0x19TXwpeBtgs5_gJUYVF%2BTKLpiJySDADg%40mail.gmail.com
>>>
>>> Intent to Experiment: 
>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/6TRT0XsVOE4/m/NOm-YEQCAgAJ
>>>
>>> Intent to Extend Experiment 1: 
>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/HErdlr3e_V0
>>>
>>>

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