UserAgent: Mozilla/5.0 (X11; CrOS x86_64 10452.69.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.117 Safari/537.36
Platform: 10452.69.0 (Official Build) beta-channel cave

Steps to reproduce the problem:
1. ASUS Chromebook c302ca - select highest screen resolution
2. Settings: Appearance/Page zoom - change to 150%
3. Now browser windows and settings page etc are displayed ok but task bar, menu is way too small.

What is the expected behavior?
I guess it's behaving as expected - but is barely usable. Some android apps are not resized at all such as Viber.

What went wrong?
Page zoom needs to affect all elements of the display to allow them to be resized to deal with high resolution screens. Ideally it should also be a settoing that is available for each screen where the user has multiple screens in use.

Did this work before? N/A 

Chrome version: 66.0.3359.117  Channel: beta
OS Version: 10452.69.0
Flash Version: 

I need to be able to use the high resolution for screen grabs - but these issues mean it's not practical to leave it set that way.