New API for computing optimization invariants.

src/gpu/batches/GrAADistanceFieldPathRenderer.cpp

Index: src/gpu/batches/GrAADistanceFieldPathRenderer.cpp
diff --git a/src/gpu/batches/GrAADistanceFieldPathRenderer.cpp b/src/gpu/batches/GrAADistanceFieldPathRenderer.cpp
index ee5fdb8a804f23fc88d88e4c96e8d02542fdb866..cf97d687c0fbf17c28cd17dc3de44119df239e7d 100644
--- a/src/gpu/batches/GrAADistanceFieldPathRenderer.cpp
+++ b/src/gpu/batches/GrAADistanceFieldPathRenderer.cpp
@@ -133,12 +133,11 @@ public:
 
     const char* name() const override { return "AADistanceFieldPathBatch"; }
 
-    void getInvariantOutputColor(GrInitInvariantOutput* out) const override {
-        out->setKnownFourComponents(fBatch.fColor);
-    }
-
-    void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override {
-        out->setUnknownSingleComponent();
+    void computeBatchToXPOverrides(GrInitInvariantOutput* color, GrInitInvariantOutput* coverage,
+                                   bool* usePLSDstRead) const {
+        color->setKnownFourComponents(fBatch.fColor);
+        coverage->setUnknownSingleComponent();
+        *usePLSDstRead = false;
     }
 
 private: