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
Review URL: https://codereview.appspot.com/7092061

git-svn-id: http://skia.googlecode.com/svn/trunk@7222 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/effects/GrConfigConversionEffect.h b/src/gpu/effects/GrConfigConversionEffect.h
index 48c776c..b8dd7d0 100644
--- a/src/gpu/effects/GrConfigConversionEffect.h
+++ b/src/gpu/effects/GrConfigConversionEffect.h
@@ -10,6 +10,7 @@
 
 #include "GrSingleTextureEffect.h"
 
+class GrEffectStage;
 class GrGLConfigConversionEffect;
 
 /**