mozilla/servo — pull request #2134 by mbrubeck (2014-04-16 22:55:29+00:00)
Title: Stop cloning FrameTrees

This fixes an issue where a ChildFrameTree is inserted into a clone of its parent, rather than its "real" parent, as noted in #2124.

This moves `FrameTree::iter` and the methods that depend on it into a new trait that is implemented on `Rc`, since it's safe to clone an `Rc`.

r? @larsbergstrom