This CL adds these classes but does not change any functonality or interface
yet. This is in preparation for future CLs. To be used for this:
https://codereview.webrtc.org/2000163002/
RTCCertificateGenerator is meant to replace DtlsIdentityStoreInterface and
implementations. In order to continue to support mocking and to help with the
transition, RTCCertificateGenerator gets an interface that it implements (just
like the store has both interface and impl).
PeerConnectionFactoryInterface::CreatePeerConnection will take an
RTCCertificateGeneratorInterface instead of DtlsIdentityStoreInterface. As to
not break Chromium, both versions of CreatePeerConnection need to exist for a
transition period. This will be done by wrapping a store into a generator
wrapper - RTCCertificateGeneratorStoreWrapper.
BUG=webrtc:5707, webrtc:5708
R=hta@webrtc.org, tommi@chromium.org, tommi@webrtc.org
Review URL: https://codereview.webrtc.org/2001103002 .
Cr-Commit-Position: refs/heads/master@{#12879}
6c96314b42