LGTM2

On Wednesday, April 16, 2025 at 8:11:46 AM UTC-7 sligh...@chromium.org 
wrote:

> LGTM1. We're excited to see this move forward.
>
> On Wednesday, April 16, 2025 at 6:22:26 AM UTC-7 Chromestatus wrote:
>
>> Contact emails cl...@google.com 
>>
>> Explainer 
>> https://github.com/WICG/document-isolation-policy/blob/main/README.md 
>>
>> Specification https://wicg.github.io/document-isolation-policy 
>>
>> Summary 
>>
>> Document-Isolation-Policy allows a document to enable 
>> crossOriginIsolation for itself, without having to deploy COOP or COEP, and 
>> regardless of the crossOriginIsolation status of the page. The policy is 
>> backed by process isolation. Additionally, the document non-CORS 
>> cross-origin subresources will either be loaded without credentials or will 
>> need to have a CORP header.
>>
>>
>> Blink component Blink>SecurityFeature 
>> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ESecurityFeature%22>
>>  
>>
>> TAG review https://github.com/w3ctag/design-reviews/issues/995 
>>
>> TAG review status Pending 
>>
>> Origin Trial Name Document Isolation Policy 
>>
>> Chromium Trial Name DocumentIsolationPolicy 
>>
>> Origin Trial documentation link 
>> https://github.com/WICG/document-isolation-policy 
>>
>> WebFeature UseCounter name kDocumentIsolationPolicyRequireCorp 
>>
>> Risks 
>>
>>
>> Interoperability and Compatibility 
>>
>> None
>>
>>
>> *Gecko*: No signal (
>> https://github.com/mozilla/standards-positions/issues/1074) 
>>
>> *WebKit*: Negative (
>> https://github.com/WebKit/standards-positions/issues/399) Safari is 
>> concerned about our first version of the API for Android, which would have 
>> us not provide access to crossOriginIsolation-gated API on very low end 
>> devices. We have revised this plan, and plan to launch on low end Android 
>> as well. 
>>
>> *Web developers*: Positive (https://github.com/WICG/proposals/issues/145) 
>> See the initial WICG proposal. We've also been in touch with developers at 
>> Google and Microsoft who think the proposed API will allow them to use 
>> Shared-Array-Buffers. Gmail, Google Meet and Zoom have experimented the 
>> feature during Origin Trial. While they still have work to do to fully roll 
>> it out, they now see deploying crossOriginIsolation as possible. Deploying 
>> crossOriginIsolation using COOP and COEP was previously impossible for 
>> them. 
>>
>> *Other signals*: 
>>
>> WebView application risks 
>>
>> Does this intent deprecate or change behavior of existing APIs, such that 
>> it has potentially high risk for Android WebView-based applications?
>>
>> We have no plans on launching the feature in Android WebView in the 
>> foreseeable future due to lack of process isolation in Android WebView.
>>
>>
>> Debuggability 
>>
>> None
>>
>>
>> Will this feature be supported on all six Blink platforms (Windows, Mac, 
>> Linux, ChromeOS, Android, and Android WebView)? No 
>>
>> We are planning to launch in M137 on desktop only (ChromeOS, Linux, 
>> Windows, MacOS). Android requires more development work due to the 
>> different process allocation model. We will add support on Android as soon 
>> as possible. However, we'd like to launch for desktop as soon as possible 
>> to help developers currently in the ungated SAB reverse origin trial get 
>> off the deprecation OT. Support on Android WebView is not possible due to 
>> the lack of process isolation.
>>
>>
>> Is this feature fully tested by web-platform-tests 
>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
>> ? Yes 
>>
>>
>> https://wpt.fyi/results/html/document-isolation-policy?label=experimental&label=master&aligned
>>
>>
>> Flag name on about://flags None 
>>
>> Finch feature name DocumentIsolationPolicy 
>>
>> Rollout plan Will ship enabled for all users 
>>
>> Requires code in //chrome? False 
>>
>> Tracking bug https://g-issues.chromium.org/issues/333029146 
>>
>> Availability expectation As of now, other browser vendors have not given 
>> us signals that they plan to implement this. 
>>
>> Adoption expectation Gmail, Google Meet and Zoom are interested in 
>> rolling out the feature to gain access to SharedArrayBuffers. They will 
>> need a bit more work, but we expect that they will be rolling it out in the 
>> next 12 months. 
>>
>> Estimated milestones 
>> Shipping on desktop 137 
>> Origin trial desktop first 132 
>> Origin trial desktop last 134 
>> Origin trial extension 1 end milestone 136 
>>
>> Anticipated spec changes 
>>
>> Open questions about a feature may be a source of future web compat or 
>> interop issues. Please list open issues (e.g. links to known github issues 
>> in the project for the feature specification) whose resolution may 
>> introduce web compat/interop risk (e.g., changing to naming or structure of 
>> the API in a non-backward-compatible way).
>> None 
>>
>> Link to entry on the Chrome Platform Status 
>> https://chromestatus.com/feature/5141940204208128?gate=5070133686173696 
>>
>> Links to previous Intent discussions Intent to Prototype: 
>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAOmohS%2BzyOX6amnva6t_HBsXPXAFoZEri7A78ka7-OwA66B%3Dmw%40mail.gmail.com
>>  
>> Intent to Experiment: 
>> https://groups.google.com/a/chromium.org/g/blink-dev/c/p52-T7m3rOM?e=48417069
>>  
>> Intent to Extend Experiment 1: 
>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/67a63f67.2b0a0220.2908d.02b2.GAE%40google.com
>>  
>>
>>
>> This intent message was generated by Chrome Platform Status 
>> <https://chromestatus.com>. 
>>
>

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