avoid extra math work in MackRec

avoid extra math work in MackRec

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/b3da83a07fd6081fd703a370ce135837f55de010

[reed1, 2014-10-01 16:25:20]

reed@google.com changed reviewers:
+ bungeman@google.com, jvanverth@google.com

[reed1, 2014-10-01 16:25:23]

The CQ bit was checked by reed@google.com

[commit-bot: I haz the power, 2014-10-01 16:26:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/615053005/1

[commit-bot: I haz the power, 2014-10-01 16:26:02]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from a valid reviewer till 2014-10-01 22:26 UTC

[bungeman-skia, 2014-10-01 19:05:26]

lgtm

[commit-bot: I haz the power, 2014-10-01 19:06:19]

Committed patchset #1 (id:1) as b3da83a07fd6081fd703a370ce135837f55de010

[robertphillips, 2014-10-01 19:58:41]

robertphillips@google.com changed reviewers:
+ robertphillips@google.com

[robertphillips, 2014-10-01 19:58:41]

https://codereview.chromium.org/615053005/diff/1/src/core/SkPaint.cpp
File src/core/SkPaint.cpp (right):

https://codereview.chromium.org/615053005/diff/1/src/core/SkPaint.cpp#newcode...
src/core/SkPaint.cpp:1483: 
too_big_for_lcd ?