title: Remote GPU clock skew estimation
body: <p><br>
  I'm trying to estimate the clock skew of a device's GPU through timestamp requests to the GPU. I read that OpenGL has those kind of requests but i'm trying to do it using WebGL.<br>
  Does anyone know a way with which I can accomplish that (either getting timestamps from the GPU, or another way to try and estimate the GPU's clock skew using WebGL)?.</p>