Collect compat data for APIs guarded by IsolatedContext #1905
Description
Looks like some new APIs like https://wicg.github.io/direct-sockets/ are guarded by https://github.com/WICG/isolated-web-apps.
In order for the collector to be able to test for support, we ought to meet the requirements for IsolatedContext (looks like it wants strict CSP among other things).