This puts the larger sub-trees first. E.g. this: ``` | 1.04 MiB -- url(http://en.wikipedia.org/wiki/Main_Page) | 0.26 MiB -- display-list | 0.78 MiB -- paint-task | 0.78 MiB -- buffer-map ``` becomes this: ``` | 1.04 MiB -- url(http://en.wikipedia.org/wiki/Main_Page) | 0.78 MiB -- paint-task | 0.78 MiB -- buffer-map | 0.26 MiB -- display-list ``` This matches how Firefox's about:memory works. Now that this is done for all sub-trees, the ad hoc sorting done for Linux segments is no longer necessary, and has been removed. Source-Repo: https://github.com/servo/servo Source-Revision: 1d9b5ced38a9b3f161795f16daf28fc449edb187