Object Info node preview in Material shading (Cycles GLSL)

Object Info node tool that alow us to add variation in materials and create id masks. I propose to implement GLSL version of it so it can be viewed in Cycles Material shading mode within the viewport.

Object Node imho is one of the last nodes that need to be implemented in viewport to call Material shading fully workable. BSDFs can be approximated but input nodes should work in order to proper preview.