Code review comment for lp:~alan-griffiths/mir/move-graphicsplatform-dependencies-to-graphics

One concern I have is that we move some interfaces away from their consumers (e.g. msh::PixelBuffer). Although the consumer can still conceptually stay in control of the interface, the dissociation makes it less intuitive to do so. An alternative would be to change the license in files without moving them, but that's arguably more complicated and confusing for interested parties. So I guess this dissociation is something we will need to live with :/