SkRecord: Strip out cull-skipping and y-only drawPosTextH skipping.

These optimizations are outclassed by a general bounding-box hierarchy,
and are just going to make plugging that into SkRecordDraw more complicated.

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

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/452983002
7 files changed