Revert "De-virtualize SkCanvas save/restore."

(To allow a roll fix into the tree).

This reverts commit edf702204be42c945254191f9f9cd6585b3d189b.

R=halcanary@google.com

Review URL: https://codereview.chromium.org/194923008

git-svn-id: http://skia.googlecode.com/svn/trunk@13748 2bbb7eff-a529-9590-31e7-b0007b416f81
21 files changed