Tiling doesn't work when you switch Mac monitors

[Capstan]

I've filed https://code.google.com/p/chromium/issues/detail?id=260113, since I'm pretty sure it's not your code, but your tiler has issues tiling to the right dimensions if you end up switching from Chrome launched on a Mac laptop to running the same laptop closed against an external monitor (of larger extents).

[lmanul]

Cool, thanks for reporting this (and sorry for the super late answer!). It does sound like a Chrome bug, but it's always good to track it here.