bug 908841 - step 1 - Move WebGL extension managment in WebGLContextExtensions.cpp - r=jgilbert
bug 908841 - step 2 - Factorise WebGL extensions naming - r=jgilbert
bug 908841 - step 3 - Change the WebGL 2 validation mechanism - r=jgilbert
bug 908841 - step 4 - Add more natively supported extensions in WebGL 2 - r=jgilbert