New API for computing optimization invariants.

src/gpu/batches/GrDrawPathBatch.h

Index: src/gpu/batches/GrDrawPathBatch.h
diff --git a/src/gpu/batches/GrDrawPathBatch.h b/src/gpu/batches/GrDrawPathBatch.h
index 39c729fa28662b0047f390d1d89874d0bd2a9619..c234cb9a3b608de8d4682c211016b52d11cb7728 100644
--- a/src/gpu/batches/GrDrawPathBatch.h
+++ b/src/gpu/batches/GrDrawPathBatch.h
@@ -19,12 +19,11 @@
 
 class GrDrawPathBatchBase : public GrDrawBatch {
 public:
-    void getInvariantOutputColor(GrInitInvariantOutput* out) const override {
-        out->setKnownFourComponents(fColor);
-    }
-
-    void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override {
-        out->setKnownSingleComponent(0xff);
+    void computeBatchToXPOverrides(GrInitInvariantOutput* color, GrInitInvariantOutput* coverage,
+                                   bool* usePLSDstRead) const {
+        color->setKnownFourComponents(fColor);
+        coverage->setKnownSingleComponent(0xff);
+        *usePLSDstRead = false;
     }
 
     void setStencilSettings(const GrStencilSettings& stencil) { fStencilSettings = stencil; }