Update XPF invariant info to not account for conflation

src/gpu/effects/GrCustomXfermode.cpp

Index: src/gpu/effects/GrCustomXfermode.cpp
diff --git a/src/gpu/effects/GrCustomXfermode.cpp b/src/gpu/effects/GrCustomXfermode.cpp
index be2b343d452d30356cf75494d24c75c85622d0eb..ba355c5de67cffa0cbef5f261e0a8f14fbbcc06c 100644
--- a/src/gpu/effects/GrCustomXfermode.cpp
+++ b/src/gpu/effects/GrCustomXfermode.cpp
@@ -807,11 +807,10 @@ bool GrCustomXPFactory::willReadDstColor(const GrCaps& caps,
     return false;
 }
 
-void GrCustomXPFactory::getInvariantOutput(const GrProcOptInfo& colorPOI,
-                                               const GrProcOptInfo& coveragePOI,
-                                               GrXPFactory::InvariantOutput* output) const {
-    output->fWillBlendWithDst = true;
-    output->fBlendedColorFlags = 0;
+void GrCustomXPFactory::getInvariantBlendedColor(const GrProcOptInfo& colorPOI,
+                                                 InvariantBlendedColor* blendedColor) const {
+    blendedColor->fWillBlendWithDst = true;
+    blendedColor->fKnownColorFlags = kNone_GrColorComponentFlags;
 }
 
 GR_DEFINE_XP_FACTORY_TEST(GrCustomXPFactory);