UserAgent: Mozilla/5.0 (X11; CrOS x86_64 10895.78.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.120 Safari/537.36
Platform: 10895.78.0 (Official Build) stable-channel eve

Steps to reproduce the problem:
1. Have Shelf on bottom
2. Have Shelf set to "Autohide"
3. Set Display Size to 90% on Chromebook Pixel or similar

What is the expected behavior?
I can place cursor at bottom of screen to make Shelf appear. Windows should also all be one single piece instead of gaps between them.

What went wrong?
When using 90%, a lot of the Chrome UI gets 1px gaps between elements, letting you see through the windows. This also I believe, creates a 1px gap at the bottom of the screen for the shelf, so hovering the cursor on the bottom of the screen won't trigger the Shelf to appear. There is about a 10% success rate with making it appear. I've literally given up and now use the physical keyboard button. It's extremely annoying and in my case has completely broken the OS experience for me. I had to just set my Shelf to not autohide.

I am attaching a screenshot that shows the gap under the title bar for the Chrome OS Settings window, allowing you to see through to the window behind it, the Slack Android app with a window that is a pixel bigger to the right than the title bar is long, and finally the bottom Shelf isn't attached to the bottom, there is a pixel gap below it as well (which I'm assuming has to do with why I can't just mouse down to the bottom of the screen to make it appear anymore).

Did this work before? Yes 68

Chrome version: 69.0.3497.120  Channel: stable
OS Version: 10895.78.0
Flash Version:
 

Deleted: Screenshot 2018-10-16 at 10.59.33 AM.png 302 KB

	Screenshot 2018-10-16 at 10.59.33 AM.png 302 KB View Download