Revert of Add isSingleComponent bool to getConstantColorComponent

src/gpu/effects/GrDistanceFieldTextureEffect.cpp

Index: src/gpu/effects/GrDistanceFieldTextureEffect.cpp
diff --git a/src/gpu/effects/GrDistanceFieldTextureEffect.cpp b/src/gpu/effects/GrDistanceFieldTextureEffect.cpp
index 245a0355922657733f67cb087a1ec755f76fe805..d5d334805c105eb56012bf8729353df9b1b99655 100755
--- a/src/gpu/effects/GrDistanceFieldTextureEffect.cpp
+++ b/src/gpu/effects/GrDistanceFieldTextureEffect.cpp
@@ -206,14 +206,14 @@
            fFlags == cte.fFlags;
 }
 
-void GrDistanceFieldTextureEffect::onComputeInvariantOutput(
-    InvariantOutput* inout) const {
-    if (inout->isOpaque() && GrPixelConfigIsOpaque(this->texture(0)->config())) {
-        inout->fValidFlags = kA_GrColorComponentFlag;
+void GrDistanceFieldTextureEffect::getConstantColorComponents(GrColor* color,
+                                                             uint32_t* validFlags) const {
+    if ((*validFlags & kA_GrColorComponentFlag) && 0xFF == GrColorUnpackA(*color) &&
+        GrPixelConfigIsOpaque(this->texture(0)->config())) {
+        *validFlags = kA_GrColorComponentFlag;
     } else {
-        inout->fValidFlags = 0;
-    }
-    inout->fIsSingleComponent = false;
+        *validFlags = 0;
+    }
 }
 
 const GrBackendGeometryProcessorFactory& GrDistanceFieldTextureEffect::getFactory() const {
@@ -476,14 +476,14 @@
             fFlags == cte.fFlags);
 }
 
-void GrDistanceFieldLCDTextureEffect::onComputeInvariantOutput(
-    InvariantOutput* inout) const {
-    if (inout->isOpaque() && GrPixelConfigIsOpaque(this->texture(0)->config())) {
-        inout->fValidFlags = kA_GrColorComponentFlag;
+void GrDistanceFieldLCDTextureEffect::getConstantColorComponents(GrColor* color,
+                                                                 uint32_t* validFlags) const {
+    if ((*validFlags & kA_GrColorComponentFlag) && 0xFF == GrColorUnpackA(*color) &&
+        GrPixelConfigIsOpaque(this->texture(0)->config())) {
+        *validFlags = kA_GrColorComponentFlag;
     } else {
-        inout->fValidFlags = 0;
-    }
-    inout->fIsSingleComponent = false;
+        *validFlags = 0;
+    }
 }
 
 const GrBackendGeometryProcessorFactory& GrDistanceFieldLCDTextureEffect::getFactory() const {