UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.167 Safari/537.36

Steps to reproduce the problem:
1.Launch Chrome
2.Go to https://webrtc.github.io/samples/src/content/getusermedia/gum/ 
3.It will pop out dialogs for camera permission
4.Allow permissions for both “Allow Chrome to take pictures and record video” and “webrtc.github.io wants to use your camera”

What is the expected behavior?
Camera can be opened successful in Chrome

What went wrong?
1.Chrome has stopped at first time launch
2.After refresh the page, camera can’t be opened successful and only black screen is displayed
3.Camera can be opened successful with “Firefox” browser

Did this work before? Yes 63.0.3239.111

Chrome version: 64.0.3282.167  Channel: n/a
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: