(For reference, more detailed technical information was cross-posted here.)
From your other post, it looks like the device is up-to-date, but it still says WebGL is not supported.
I don't know why this would happen - all modern devices support WebGL, either with hardware support or software rendering if there is some issue with the GPU drivers.
I think only Google can help you with this, so try filing an issue at crbug.com.