Some but not all Intel affected.
AMD affected.
ARM seems fine.

Last good: R73-11393.0.0
First bad: R73-11400.0.0
https://crosland.corp.google.com/log/11393.0.0..11400.0.0
https://chromium.googlesource.com/chromium/src/+log/73.0.3638.0..73.0.3639.0?n=10000

https://stainless.corp.google.com/search?view=matrix&row=model&col=build&first_date=2018-12-11&last_date=2018-12-17&test=graphics_WebGLPerformance&exclude_cts=false&exclude_not_run=false&exclude_non_release=true&exclude_au=true&exclude_acts=true&exclude_retried=true&exclude_non_production=false

There seem to be many "GL ERROR :GL_INVALID_OPERATION : glFramebufferTexture2D: <- error from previous GL command" in the logs.