As part of Chrome 52 release there were some performance and security enhancements, one of them was the decision to switch over to using Elliptic Curve Cryptography for generating the self-sign certificate used in the DTLS handshake. ECDSA is mandatory in WebRTC, question is, should you be worried about patent claims in this regards.
Chrome 52 beta channel release notes were published covering over 30 bug fixes, enhancements to the support for H.264 in Chrome and changes to default DTLS certificate generation algorithm for more privacy and better performance. This version is expected to hit your browser on July 26. The support for WebRTC H.264 in browsers is required by the IETF