New API for computing optimization invariants.

src/gpu/batches/GrAtlasTextBatch.h

Index: src/gpu/batches/GrAtlasTextBatch.h
diff --git a/src/gpu/batches/GrAtlasTextBatch.h b/src/gpu/batches/GrAtlasTextBatch.h
index 63dfa30e6bb53076bc89fbd262c97c8ac8c7ad92..59b5ee95f985da2db676c29c929a58cd0667d873 100644
--- a/src/gpu/batches/GrAtlasTextBatch.h
+++ b/src/gpu/batches/GrAtlasTextBatch.h
@@ -102,10 +102,6 @@ public:
 
     SkString dumpInfo() const override;
 
-    void getInvariantOutputColor(GrInitInvariantOutput* out) const override;
-
-    void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override;
-
     static size_t GetVertexStride(GrMaskFormat maskFormat) {
         switch (maskFormat) {
             case kA8_GrMaskFormat:
@@ -126,6 +122,11 @@ public:
         }
     }
 
+protected:
+    void computeBatchToXPOverrides(GrInitInvariantOutput* color, GrInitInvariantOutput* coverage,
+                                   bool* usePLSDstRead) const override;
+
+
 private:
     void initBatchTracker(const GrPipelineOptimizations& opt) override;