Implement the new instanced draw calls.
I expect there already is a bug for implementing the ANGLE_instanced_arrays extension for WebGL 1.0, which provides similar functionality.
Created attachment 248762 [details]
Comment on attachment 248762 [details]
View in context: https://bugs.webkit.org/attachment.cgi?id=248762&action=review
> + These tests will be landed along with other modified extension conformance tests
> + once approval from Khronos is received.
I think we should last at least some tests that exercise this new feature.