To enable webgl in Google Chrome launch it with the following flags
--enable-webgl --ignore-gpu-blacklist
$ google-chrome --enable-webgl --ignore-gpu-blacklist
Now test webgl by opening the following url
http://get.webgl.org/
It should show a spinning cube if webgl is working correctly.
Open the following url in chrome
about:chrome or chrome://gpu/
It should show the following data
Graphics Feature Status Canvas: Hardware accelerated Compositing: Hardware accelerated 3D CSS: Hardware accelerated CSS Animation: Accelerated WebGL: Hardware accelerated WebGL multisampling: Hardware accelerated Flash 3D: Hardware accelerated Flash Stage3D: Hardware accelerated Texture Sharing: Hardware accelerated undefined: Hardware accelerated