add a ClassID function to GrBatch

gm/beziereffects.cpp

Index: gm/beziereffects.cpp
diff --git a/gm/beziereffects.cpp b/gm/beziereffects.cpp
index 1886a4a2b0ae811503045fc42a389dadd4736838..81d5c583d8c89778e4c5db6b0d1f5a1a27b151ed 100644
--- a/gm/beziereffects.cpp
+++ b/gm/beziereffects.cpp
@@ -32,6 +32,7 @@ namespace skiagm {
 
 class BezierCubicOrConicTestBatch : public GrTestBatch {
 public:
+    DEFINE_BATCH_CLASS_ID
     struct Geometry : public GrTestBatch::Geometry {
         SkRect fBounds;
     };
@@ -46,8 +47,7 @@ public:
 private:
     BezierCubicOrConicTestBatch(const GrGeometryProcessor* gp, const Geometry& geo,
                                 const SkScalar klmEqs[9], SkScalar sign)
-        : INHERITED(gp, geo.fBounds) {
-        this->initClassID<BezierCubicOrConicTestBatch>();
+        : INHERITED(ClassID(), gp, geo.fBounds) {
         for (int i = 0; i < 9; i++) {
             fKlmEqs[i] = klmEqs[i];
         }
@@ -432,6 +432,7 @@ private:
 
 class BezierQuadTestBatch : public GrTestBatch {
 public:
+    DEFINE_BATCH_CLASS_ID
     struct Geometry : public GrTestBatch::Geometry {
         SkRect fBounds;
     };
@@ -446,10 +447,9 @@ public:
 private:
     BezierQuadTestBatch(const GrGeometryProcessor* gp, const Geometry& geo,
                         const GrPathUtils::QuadUVMatrix& devToUV)
-        : INHERITED(gp, geo.fBounds)
+        : INHERITED(ClassID(), gp, geo.fBounds)
         , fGeometry(geo)
         , fDevToUV(devToUV) {
-        this->initClassID<BezierQuadTestBatch>();
     }
 
     struct Vertex {