Revert of Add isSingleComponent bool to getConstantColorComponent

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 efd622ea727ef8b4c54fa1600afae54560c3508f..b8d774d6101dde312c2a80e1b9f0e9b8ab1b321a 100644
--- a/src/gpu/effects/GrDistanceFieldTextureEffect.h
+++ b/src/gpu/effects/GrDistanceFieldTextureEffect.h
@@ -58,6 +58,8 @@
 
     static const char* Name() { return "DistanceFieldTexture"; }
 
+    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
+
     const GrShaderVar& inTextureCoords() const { return fInTextureCoords; }
 #ifdef SK_GAMMA_APPLY_TO_A8
     float getLuminance() const { return fLuminance; }
@@ -76,8 +78,6 @@
                                  uint32_t flags);
 
     virtual bool onIsEqual(const GrProcessor& other) const SK_OVERRIDE;
-
-    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE;
 
     GrTextureAccess    fTextureAccess;
 #ifdef SK_GAMMA_APPLY_TO_A8
@@ -112,6 +112,7 @@
     static const char* Name() { return "DistanceFieldLCDTexture"; }
 
     const GrShaderVar& inTextureCoords() const { return fInTextureCoords; }
+    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
     GrColor getTextColor() const { return fTextColor; }
     uint32_t getFlags() const { return fFlags; }
 
@@ -127,8 +128,6 @@
 
     virtual bool onIsEqual(const GrProcessor& other) const SK_OVERRIDE;
 
-    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE;
-
     GrTextureAccess    fTextureAccess;
     GrTextureAccess    fGammaTextureAccess;
     GrColor            fTextColor;