Why does Google Chrome fail to draw tabs correctly when the Discrete graphics adapter is in use? Google Chrome fails to paint browser tabs correctly while the Discrete graphics adapter is in use.

I have an Early 2011 15" MacBook Pro running OSX 10.10.5 (Yosemite) and am running Chrome Version 53.0.2785.143 (64-bit). This problem began about a month ago.
Not sure if this is still relevant to you but maybe this will help you: 

MacBook Pro Repair Extension Program for Video Issues

Basically your GPU might be faulty and Apple will fix it for free.