Just tested it, the same bug also happens on Windows 8, and on another copy of windows 10.
all of them are 47.0.2526.73 m chrome. 46 line of Chrome works fine.
You can test it here:
No extra plugins (third party/first party) and objects here, just a single on start of layout event requesting camera at source 0.
Works fine on firefox and opera. It also happens while testing a bundled webcam example.
E: the same problem is with the mic user media. I made test on built-in examples too.
E2: It also does not work when using the latest (218) beta release.