Refactor: clean up some unused or mostly-unused API I saw here.

BUG=
R=bungeman@google.com, reed@google.com

Author: mtklein@google.com

Review URL: https://chromiumcodereview.appspot.com/17414003

git-svn-id: http://skia.googlecode.com/svn/trunk@9668 2bbb7eff-a529-9590-31e7-b0007b416f81
6 files changed