Stop sorting the results of SkBBH::search().

We only seem to need to sort with SkQuadTree, which is not actively used by
client code.  So it's really just wasted work.  SkQuadTree is interesting, but
I'd rather disable it than slow down the production code path.

BUG=skia:2834
R=robertphillips@google.com, mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/471063004
3 files changed