add a ClassID function to GrBatch

src/gpu/batches/GrTessellatingPathRenderer.cpp

Index: src/gpu/batches/GrTessellatingPathRenderer.cpp
diff --git a/src/gpu/batches/GrTessellatingPathRenderer.cpp b/src/gpu/batches/GrTessellatingPathRenderer.cpp
index 46fa280cfd86c6e67a429c547a1e987e1af6f135..4cec61a9c455c9a3f3c03c8c0ab1a178151bbfd5 100644
--- a/src/gpu/batches/GrTessellatingPathRenderer.cpp
+++ b/src/gpu/batches/GrTessellatingPathRenderer.cpp
@@ -1385,7 +1385,6 @@ bool GrTessellatingPathRenderer::onCanDrawPath(const CanDrawPathArgs& args) cons
 
 class TessellatingPathBatch : public GrVertexBatch {
 public:
-
     static GrDrawBatch* Create(const GrColor& color,
                                const SkPath& path,
                                const GrStrokeInfo& stroke,
@@ -1394,6 +1393,8 @@ public:
         return new TessellatingPathBatch(color, path, stroke, viewMatrix, clipBounds);
     }
 
+    BATCH_CLASS_ID
+
     const char* name() const override { return "TessellatingPathBatch"; }
 
     void getInvariantOutputColor(GrInitInvariantOutput* out) const override {