New API for computing optimization invariants.

src/gpu/batches/GrDrawAtlasBatch.h

Index: src/gpu/batches/GrDrawAtlasBatch.h
diff --git a/src/gpu/batches/GrDrawAtlasBatch.h b/src/gpu/batches/GrDrawAtlasBatch.h
index de128f211db1ccc9e7b245f77c64faaa08e67df0..1f6167a2b6a68934c9688db4e109368da8f5489f 100644
--- a/src/gpu/batches/GrDrawAtlasBatch.h
+++ b/src/gpu/batches/GrDrawAtlasBatch.h
@@ -29,17 +29,16 @@ public:
     
     const char* name() const override { return "DrawAtlasBatch"; }
     
-    void getInvariantOutputColor(GrInitInvariantOutput* out) const override {
+    void computeBatchToXPOverrides(GrInitInvariantOutput* color, GrInitInvariantOutput* coverage,
+                                   bool* usePLSDstRead) const override {
         // When this is called on a batch, there is only one geometry bundle
         if (this->hasColors()) {
-            out->setUnknownFourComponents();
+            color->setUnknownFourComponents();
         } else {
-            out->setKnownFourComponents(fGeoData[0].fColor);
+            color->setKnownFourComponents(fGeoData[0].fColor);
         }
-    }
-    
-    void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override {
-        out->setKnownSingleComponent(0xff);
+        coverage->setKnownSingleComponent(0xff);
+        *usePLSDstRead = false;
     }
 
     SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; }