Revert of Revert of Revert "De-virtualize SkCanvas save/restore."

Revert of Revert of Revert "De-virtualize SkCanvas save/restore." (https://codereview.chromium.org/196323003/)

Reason for revert:
Pulling out to rename the virtuals.

Original issue's description:
> Revert of Revert "De-virtualize SkCanvas save/restore." (https://codereview.chromium.org/194923008/)
> 
> Reason for revert:
> Re-landing after roll fix.
> 
> Original issue's description:
> > Revert "De-virtualize SkCanvas save/restore."
> > 
> > (To allow a roll fix into the tree).
> > 
> > This reverts commit edf702204be42c945254191f9f9cd6585b3d189b.
> > 
> > R=halcanary@google.com
> > 
> > Committed: https://code.google.com/p/skia/source/detail?r=13748
> 
> TBR=halcanary@google.com,fmalita@chromium.org
> NOTREECHECKS=true
> NOTRY=true
> 
> Committed: http://code.google.com/p/skia/source/detail?r=13754

TBR=halcanary@google.com,fmalita@chromium.org
NOTREECHECKS=true
NOTRY=true

Committed: http://code.google.com/p/skia/source/detail?r=13765

[fmalita_google_do_not_use, 2014-03-12 15:07:56]

Created Revert of Revert of Revert "De-virtualize SkCanvas save/restore."

[commit-bot: I haz the power, 2014-03-12 15:08:01]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/fmalita@google.com/197553002/1

[commit-bot: I haz the power, 2014-03-12 15:08:29]

Change committed as 13765