Add onGetBlendInfo to GrXferProcessor

src/gpu/effects/GrCoverageSetOpXP.cpp

Index: src/gpu/effects/GrCoverageSetOpXP.cpp
diff --git a/src/gpu/effects/GrCoverageSetOpXP.cpp b/src/gpu/effects/GrCoverageSetOpXP.cpp
index a5e9b2fc745da773475f7b5c1381a80d28ce70f0..908ddd6f887a26eeb42d30d614d81e8b60b22ec3 100644
--- a/src/gpu/effects/GrCoverageSetOpXP.cpp
+++ b/src/gpu/effects/GrCoverageSetOpXP.cpp
@@ -35,8 +35,6 @@ public:
                                                GrColor* color,
                                                const GrDrawTargetCaps& caps) override;
 
-    void getBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const override;
-
     bool invertCoverage() const { return fInvertCoverage; }
 
 private:
@@ -44,6 +42,8 @@ private:
 
     void onGetGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuilder* b) const override;
 
+    void onGetBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const override;
+
     bool onIsEqual(const GrXferProcessor& xpBase) const override {
         const CoverageSetOpXP& xp = xpBase.cast<CoverageSetOpXP>();
         return (fRegionOp == xp.fRegionOp &&
@@ -117,7 +117,7 @@ CoverageSetOpXP::getOptimizations(const GrProcOptInfo& colorPOI,
     return GrXferProcessor::kIgnoreColor_OptFlag; 
 }
 
-void CoverageSetOpXP::getBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const {
+void CoverageSetOpXP::onGetBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const {
     switch (fRegionOp) {
         case SkRegion::kReplace_Op:
             blendInfo->fSrcBlend = kOne_GrBlendCoeff;