Check for xfer barriers in GrBatch, auto-issue barriers in GrGpu

src/gpu/batches/GrRectBatch.h

Index: src/gpu/batches/GrRectBatch.h
diff --git a/src/gpu/batches/GrRectBatch.h b/src/gpu/batches/GrRectBatch.h
index aa227d46ff1fd21cfd9bf8345db9705c75d6b5e1..3f13ef5bb5b9505efb83498581ac9083405a6c30 100644
--- a/src/gpu/batches/GrRectBatch.h
+++ b/src/gpu/batches/GrRectBatch.h
@@ -66,7 +66,7 @@ private:
     bool hasLocalMatrix() const { return fGeoData[0].fHasLocalMatrix; }
     bool coverageIgnored() const { return fBatch.fCoverageIgnored; }
 
-    bool onCombineIfPossible(GrBatch* t) override;
+    bool onCombineIfPossible(GrBatch* t, const GrCaps&) override;
 
     const GrGeometryProcessor* createRectGP();