API and permissions

[youennf]

This specification is defining an API that might be gated by a user prompt.
As per spec: User agents must only start speech input sessions with explicit, informed user consent.

In that case, it seems some language could be added and refer to https://w3c.github.io/permissions/
That might also help defining the behavior for third party contexts, like done for other APIs such as getUserMedia.

[youennf]

Starting speech recognition should also probably be gated by some user activation.