UserAgent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36

Example URL:

Steps to reproduce the problem:
1. open the attached html in Canary

What is the expected behavior?
the list of webgl extentions in the log should include WEBGL_draw_buffers.

What went wrong?
WEBGL_draw_buffers is not in the log.

Does it occur on multiple sites: N/A

Is it a problem with a plugin? N/A 

Did this work before? N/A 

Does this work in other browsers? Yes 

Chrome version: 52.0.2718.0  Channel: canary
OS Version: 10.0
Flash Version: Shockwave Flash 21.0 r0

open the repro in Chrome 49 and you will notice WEBGL_draw_buffers in the log (assuming it's not disabled because of OS/GPU)
 

Deleted: repro.zip 8.3 MB

repro.zip 8.3 MB Download