Google Chrome	72.0.3593.0 (Official Build) dev (64-bit)
Firmware Version	Google_Caroline.7820.384.0
and
Google Chrome	71.0.3572.0 (Official Build) dev (64-bit)
Google_Caroline.7820.384.0 

Steps:
# Launch ChromeVox with ctrl + alt + z
# Navigate to an HTML select box that has the ability to make multiple selections, I used the "Select multiple:" box in http://chrome-accessibility.appspot.com/static/html5controls.html
# Select multiple selections using shift + moving the arrow keys up or down
Expected: screen reader has a way of being notified as to what you have selected
Actual: screen reader only reads the line you are on - it says the same thing if you have an item selected or not selected