This patch adds a Cancel() method to the U2FTokenTransport interface so that
we can forward request cancellations to the actual token manager implementation.
The current softtoken doesn't need that as it processes API calls synchronously,
USB HID tokens however need a cancellation mechanism.
The SendRequestCancel() call has been removed from WebAuthnManager::Cancel() as
we're currently only calling this method either when the chrome process
cancels the request (and then we don't need to send it back again) or the
content process fails to process the data after a request was fulfilled and
thus there's nothing to cancel. We will touch this again later when the UI
cancels requests on tab switch and similar user actions.
Takes functionality once in the WebAuthentication DOM class that needs
to be handled by the content process, and moves it to a
singleton (per-content-process) manager class. This allows the
WebAuthn API to centralize management of transactions and IPC
channels. Patch also creates the child (content-process) classes for
WebAuthn IPC channels.
MozReview-Commit-ID: 6ju2LK8lvNR
Tim Taubert
Bill McCloskey
David Keeler
Kyle Machulis