No, there will be no fix for Chrome 37 and later. If you want to use the addon you may use Chrome 35 or 36.
The issue is because Chrome 37 remove the SDES support and use only DTLS-SRTP. Asterisk Version > 11.11 support DTLS-SRTP in native way but the OS used by Elastix(CENTOS 5) is too old for compiling dtls-srtp support, and the same happen to the WebRTC2SIP media gateway. I have spent the last week trying to update to the latest OpenSSL or made a workaround to compile Asterisk or WebRTC2SIP but the OS is too old and DTLS-SRTP is not supported.
Sorry for the bad news.