UserAgent: Mozilla/5.0 (X11; CrOS armv7l 10718.34.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.40 Safari/537.36
Platform: 10718.34.0 (Official Build) beta-channel veyron_minnie

Steps to reproduce the problem:
1. Use Desktop Capture Sample, and start capture
　Desktop Capture Sample: https://chrome.google.com/webstore/detail/desktop-capture-sample/mhkidniocjdaiddjckopkigjmjbadfji
2. Change device Orientation to 90°

What is the expected behavior?
The orientation of the capture image matches the desktop screen

What went wrong?
Capture Image rotated 90 degrees

Did this work before? Yes 67.0.3396.99

Does this work in other browsers? N/A

Chrome version: 68.0.3440.40  Channel: beta
OS Version: 10718.34.0
Flash Version: 30.0.0.127 /opt/google/chrome/pepper/libpepflashplayer.so

version67.png : orientation of the capture image matches the desktop screen (os version 67.0.3396.99)
version68.png : orientation of the capture image rotated 90 degrees (os version 68.0.3440.34)
 

Deleted: version67.png 103 KB

	version67.png 103 KB View Download

Deleted: version68.png 461 KB

	version68.png 461 KB View Download