WebGL doesn't work in Chromium on Ubuntu
Solution 1:
Here is bugreport of the bug that you have encoutered: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1463598
The ubuntu maintainer of Chromium has deliberately disabled GPU acceleration in the ubuntu build in Chromium 43, see bugreports comments for details.
To workaround this issue you can downgrade to a previous version of Chromium.