UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Steps to reproduce the problem:
1. Install a theme that has a visible pattern on the tab strip. I use "Grass" https://chrome.google.com/webstore/detail/grass/mmiboiefncpfjihjdedpaoammipkilla but I have tried another theme (Into the Mist) and seen the same problem.
2. Open an incognito window (easier to see problem)
3. Visit a page with links (eg https://www.google.com/search?q=testing)
4. Open links in a new tab (without switching to them), either with Ctrl+click, middle mouse button, or right-click -> open in new tab.

What is the expected behavior?
Tab opens and the theme pattern is visible behind the tab.

What went wrong?
Sometimes the tab appears as if the background has been smeared horizontally (see attached). Looks like some sort of graphics/compositing bug? Possibly related to issue 884358, except this issue is specific to the tab strip only. This only happens if you do not switch tabs in the same window.

A [redraw?] occurs (fixing all the tabs that look wrong) after all of the following:
- switching to a different tab in the same window(including clicking the new tab button to open a new tab)
- maximizing or un-maximizing the window
- un-minimizing a window
but not after:
- switching windows and back with alt-tab (without minimizing)
- closing tabs without switching tabs, even if tabs are then resized to fit available space.

Did this work before? N/A 

Chrome version: 69.0.3497.100  Channel: stable
OS Version: 10.0.17134
Flash Version: 

I encountered this immediately after updating from chrome 68 to 69 (with the new material design UI).
 

Deleted: chrome-md-titlebar-bug.png 120 KB

	chrome-md-titlebar-bug.png 120 KB View Download