Wrap GrEffects in GrEffectPtr.

Wrap GrEffects in GrEffectPtr.

This is the first step towards automatic recycling of scratch resouces in the cache via ref-cnts.

R=robertphillips@google.com
Committed: https://code.google.com/p/skia/source/detail?r=7222

[bsalomon, 2013-01-15 22:39:32]

Lots o' files. But most of the changes are cookie-cutter. The interesting file
is GrEffect.

[robertphillips, 2013-01-16 14:10:31]

LGTM

https://codereview.appspot.com/7092061/diff/2001/include/gpu/GrEffect.h
File include/gpu/GrEffect.h (right):

https://codereview.appspot.com/7092061/diff/2001/include/gpu/GrEffect.h#newco...
include/gpu/GrEffect.h:59: There is no public way to wrap a GrEffect in a
GrEffectPtr. Thus, a factory should be a static
subclasses -> subclass