Move GrInvariantOutput out of GrProcessor and into its own class.

src/gpu/effects/GrDistanceFieldTextureEffect.h

Index: src/gpu/effects/GrDistanceFieldTextureEffect.h
diff --git a/src/gpu/effects/GrDistanceFieldTextureEffect.h b/src/gpu/effects/GrDistanceFieldTextureEffect.h
index ea02d195b7d8de759e043fbe82e926ab4d2685a8..bcc40889fd7b6f71d7982f3f321ad19d0ba575b0 100644
--- a/src/gpu/effects/GrDistanceFieldTextureEffect.h
+++ b/src/gpu/effects/GrDistanceFieldTextureEffect.h
@@ -14,6 +14,7 @@
 class GrGLDistanceFieldTextureEffect;
 class GrGLDistanceFieldNoGammaTextureEffect;
 class GrGLDistanceFieldLCDTextureEffect;
+class GrInvariantOutput;
 
 enum GrDistanceFieldEffectFlags {
     kSimilarity_DistanceFieldEffectFlag = 0x01,   // ctm is similarity matrix
@@ -80,7 +81,7 @@ 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;
 #ifdef SK_GAMMA_APPLY_TO_A8
@@ -126,7 +127,7 @@ 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;
     uint32_t           fFlags;
@@ -172,7 +173,7 @@ 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;
     GrTextureAccess    fGammaTextureAccess;