cleanup rasterclip helper

cleanup rasterclip helper

TBR=robertphilips

Committed: https://skia.googlesource.com/skia/+/73e714eb766617ce06757829a3c0b345c7963faa

[reed1, 2014-09-04 15:52:49]

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

[reed1, 2014-09-04 15:52:50]

just a rename

[reed1, 2014-09-04 15:53:02]

The CQ bit was checked by reed@google.com

[commit-bot: I haz the power, 2014-09-04 15:53:50]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/reed@google.com/540983002/1

[commit-bot: I haz the power, 2014-09-04 15:53:50]

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 2014-09-04 21:53 UTC

[reed1, 2014-09-04 16:01:58]

The CQ bit was unchecked by reed@google.com

[reed1, 2014-09-04 16:02:05]

The CQ bit was checked by reed@google.com

[commit-bot: I haz the power, 2014-09-04 16:02:11]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/reed@google.com/540983002/1

[commit-bot: I haz the power, 2014-09-04 16:02:28]

Committed patchset #1 (id:1) as 73e714eb766617ce06757829a3c0b345c7963faa

[robertphillips, 2014-09-04 17:20:45]

lgtm