Move GrInvariantOutput out of GrProcessor and into its own class.

src/gpu/effects/GrBicubicEffect.h

Index: src/gpu/effects/GrBicubicEffect.h
diff --git a/src/gpu/effects/GrBicubicEffect.h b/src/gpu/effects/GrBicubicEffect.h
index 642f7cfc5a63ac22d3c2dd45e23e7fa2d2407ec6..8f11825704bca6b1da60f4bf412bbc08e074e3db 100644
--- a/src/gpu/effects/GrBicubicEffect.h
+++ b/src/gpu/effects/GrBicubicEffect.h
@@ -14,6 +14,7 @@
 #include "GrTBackendProcessorFactory.h"
 
 class GrGLBicubicEffect;
+class GrInvariantOutput;
 
 class GrBicubicEffect : public GrSingleTextureEffect {
 public:
@@ -92,7 +93,7 @@ private:
                     const SkMatrix &matrix, const SkRect& domain);
     virtual bool onIsEqual(const GrFragmentProcessor&) const SK_OVERRIDE;
 
-    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE;
+    virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE;
 
     float           fCoefficients[16];
     GrTextureDomain fDomain;