Move GrInvariantOutput out of GrProcessor and into its own class.

Move GrInvariantOutput out of GrProcessor and into its own class.

This will help with the ability to subclass, add to, etc. GrInvariantOutput. Also it was simply
getting a little too big to be a "supporting" subclass
BUG=skia:

Committed: https://skia.googlesource.com/skia/+/605dd0fbce9dbb2a0d3313e13e161f2bd54870d7

[egdaniel, 2014-11-04 19:08:41]

egdaniel@google.com changed reviewers:
+ bsalomon@google.com

[bsalomon, 2014-11-04 19:57:05]

lgtm, tiny nit and q's.

https://codereview.chromium.org/699943003/diff/1/src/gpu/GrInvariantOutput.h
File src/gpu/GrInvariantOutput.h (right):

https://codereview.chromium.org/699943003/diff/1/src/gpu/GrInvariantOutput.h#...
src/gpu/GrInvariantOutput.h:13: class GrInvariantOutput{
missing space

https://codereview.chromium.org/699943003/diff/1/src/gpu/GrInvariantOutput.h#...
src/gpu/GrInvariantOutput.h:136: friend class GrProcessor;
curious why GrProc needs this?

Can some of these friends go away by adding public constructors?

[egdaniel, 2014-11-12 14:32:39]

just looking for a quick review since there has been a couple changes and a week
since the previous approval

[bsalomon, 2014-11-12 14:44:06]

lgtm

[egdaniel, 2014-11-12 16:26:34]

The CQ bit was checked by egdaniel@google.com

[commit-bot: I haz the power, 2014-11-12 16:27:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/699943003/80001

[commit-bot: I haz the power, 2014-11-12 16:35:31]

Committed patchset #5 (id:80001) as
https://skia.googlesource.com/skia/+/605dd0fbce9dbb2a0d3313e13e161f2bd54870d7