To help us debug issues with sidebar-host connection setup [1], report an
error to the sidebar if PortProvider receives a message which looks like
a port request (data has the structure `{ frame1: string, frame2:
string, type: 'request' }`) but comes from a non-Window source, invalid
origin or is not a valid combination of frames.

[1] https://sentry.io/organizations/hypothesis/issues/2810452318/