Update XPF invariant info to not account for conflation

src/gpu/GrProcOptInfo.h

Index: src/gpu/GrProcOptInfo.h
diff --git a/src/gpu/GrProcOptInfo.h b/src/gpu/GrProcOptInfo.h
index 059bca4dd8b8762b9879e95eb7c2d90844f0dd98..f518172e221ec09d54c8c2863d83267fd33e1436 100644
--- a/src/gpu/GrProcOptInfo.h
+++ b/src/gpu/GrProcOptInfo.h
@@ -54,7 +54,10 @@ public:
                                                fInOut.isLCDCoverage(); }
 
     GrColor color() const { return fInOut.color(); }
-    uint8_t validFlags() const { return fInOut.validFlags(); }
+
+    GrColorComponentFlags validFlags() const {
+        return static_cast<GrColorComponentFlags>(fInOut.validFlags());
+    }
 
     /**
      * Returns the index of the first effective color stage. If an intermediate stage doesn't read