servo/servo — pull request #3820 by cgaebel (2014-10-27 21:21:38+00:00)
Title: Rebase Laleh's #3505

I addressed all but one of the code review comments, which was a request
for documentation on where a number came from (which I'm not qualified to
answer), and rebased this on to latest master.

xref: #3505 cc: @LalehB @larsbergstrom

r? @pcwalton