UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36

Example URL:
https://www.khronos.org/registry/webgl/sdk/tests/conformance/extensions/oes-texture-half-float.html?webglVersion=1&quiet=0

Steps to reproduce the problem:
* Run the conformance test for OES_texture_half_float in the link in Windows
* It fails at readPixels

What is the expected behavior?

What went wrong?
Cannot do readPixels for half float framebuffers in Windows

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: 53.0.2785.116  Channel: stable
OS Version: 10.0
Flash Version: Shockwave Flash 23.0 r0

I tried the conformance test in Mac Chrome and Windows Firefox but the problem didn't reproduce.