Move GrInvariantOutput out of GrProcessor and into its own class.

src/gpu/effects/GrCustomCoordsTextureEffect.h

Index: src/gpu/effects/GrCustomCoordsTextureEffect.h
diff --git a/src/gpu/effects/GrCustomCoordsTextureEffect.h b/src/gpu/effects/GrCustomCoordsTextureEffect.h
index 3010ba245f400fdab1c4d883a7f4ed4285b5a8c2..103e20916c548b8e56799254717def7569f85254 100644
--- a/src/gpu/effects/GrCustomCoordsTextureEffect.h
+++ b/src/gpu/effects/GrCustomCoordsTextureEffect.h
@@ -12,6 +12,7 @@
 #include "GrGeometryProcessor.h"
 
 class GrGLCustomCoordsTextureEffect;
+class GrInvariantOutput;
 
 /**
  * The output color of this effect is a modulation of the input color and a sample from a texture.
@@ -39,7 +40,7 @@ private:
 
     virtual bool onIsEqual(const GrGeometryProcessor& other) const SK_OVERRIDE;
 
-    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE;
+    virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE;
 
     GrTextureAccess    fTextureAccess;
     const GrShaderVar& fInTextureCoords;