UserAgent: Mozilla/5.0 (X11; CrOS x86_64 8172.62.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.106 Safari/537.36
Platform: 8172.62.0 (Official Build) stable-channel peppy

Steps to reproduce the problem:
1. Connect HDMI monitor
2. Launch app
3. Press "Enable Capture" and select Internal Display.
4. un-plug HDMI
5. Click "Stop" in sharing notification window.

What is the expected behavior?
Stop screen sharing normally.

What went wrong?
OS hangs up(auto OS reboot)

WebStore page: https://chrome.google.com/webstore/detail/desktop-capture-sample/mhkidniocjdaiddjckopkigjmjbadfji

Did this work before? N/A 

Chrome version: 51.0.2704.106  Channel: stable
OS Version: 8172.62.0
Flash Version: Shockwave Flash 22.0 r0