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Re: [mediacapture-region] cropTo is returning promises but it is unclear when promises are supposed to be rejected synchronously or not (#14)

From: Elad Alon via GitHub <sysbot+gh@w3.org>
Date: Mon, 31 Jan 2022 20:31:50 +0000
To: public-webrtc-logs@w3.org
Message-ID: <issue_comment.created-1026182173-1643661108-sysbot+gh@w3.org>
Step 2 validates the track.
Step 4.2 validates the token.

The validation of the token is asynchronous. There are multiple reasons, but the simplest one is that if the token originates from a cross-origin iframe (which is also out-of-process), that iframe could be navigated, leading to all of its tokens becoming invalidated. To validate the token's validity, communication with another process is necessary, be it a central coordinating process (Chrome's current implementation) or the iframe's process (theoretically speaking).

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