Remove unused (by clients) SkUnitMapper
Remove unused (by clients) SkUnitMapper

This reverts commit 874423a81b5bc2541c7397e6ab00d5e7c9fdaf98.

TBR=scroggo

Author: reed@google.com

Review URL: https://codereview.chromium.org/288313009

git-svn-id: e8541e15acce502a64c929015570ad1648e548cd@14842 2bbb7eff-a529-9590-31e7-b0007b416f81

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot