Add isSingleComponent bool to getConstantColorComponent

src/gpu/GrPaint.cpp

Index: src/gpu/GrPaint.cpp
diff --git a/src/gpu/GrPaint.cpp b/src/gpu/GrPaint.cpp
index 84fdf420e269819e7eda6163d8ebee796b7c6008..02918ed302616eea54137abf458f2d596b2afc0a 100644
--- a/src/gpu/GrPaint.cpp
+++ b/src/gpu/GrPaint.cpp
@@ -54,9 +54,11 @@ bool GrPaint::getOpaqueAndKnownColor(GrColor* solidColor,
 
     GrColor coverage = GrColorPackRGBA(fCoverage, fCoverage, fCoverage, fCoverage);
     uint32_t coverageComps = kRGBA_GrColorComponentFlags;
+    bool isSingleComponent = false;
     int count = fCoverageStages.count();
     for (int i = 0; i < count; ++i) {
-        fCoverageStages[i].getProcessor()->getConstantColorComponents(&coverage, &coverageComps);
+        fCoverageStages[i].getProcessor()->getConstantColorComponents(&coverage, &coverageComps,
+                                                                      &isSingleComponent);
     }
     if (kRGBA_GrColorComponentFlags != coverageComps || 0xffffffff != coverage) {
         return false;
@@ -64,9 +66,11 @@ bool GrPaint::getOpaqueAndKnownColor(GrColor* solidColor,
 
     GrColor color = fColor;
     uint32_t colorComps = kRGBA_GrColorComponentFlags;
+    isSingleComponent = false;
     count = fColorStages.count();
     for (int i = 0; i < count; ++i) {
-        fColorStages[i].getProcessor()->getConstantColorComponents(&color, &colorComps);
+        fColorStages[i].getProcessor()->getConstantColorComponents(&color, &colorComps,
+                                                                   &isSingleComponent);
     }
 
     SkASSERT((NULL == solidColor) == (NULL == solidColorKnownComponents));