InfoBar for Camera and Mic Access

From today’s canary (19.0.1057) we have added a user consent UI for a web page to access input devices such as camera and microphones. Currently this works on Windows only, Linux and Mac support is on its way. Privacy and security are very important topics for WebRTC, and exactly how this should be handled is discussed a lot in w3c and IETF, so expect changes going forward.