add a ClassID function to GrBatch

src/gpu/batches/GrDrawVerticesBatch.cpp

Index: src/gpu/batches/GrDrawVerticesBatch.cpp
diff --git a/src/gpu/batches/GrDrawVerticesBatch.cpp b/src/gpu/batches/GrDrawVerticesBatch.cpp
index f79b6859df689d7515f1454b91bc7725085f2519..33bed0d0f815d0cf0748c4e4642534eb343a4816 100644
--- a/src/gpu/batches/GrDrawVerticesBatch.cpp
+++ b/src/gpu/batches/GrDrawVerticesBatch.cpp
@@ -45,8 +45,8 @@ GrDrawVerticesBatch::GrDrawVerticesBatch(const Geometry& geometry, GrPrimitiveTy
                                          const SkPoint* positions, int vertexCount,
                                          const uint16_t* indices, int indexCount,
                                          const GrColor* colors, const SkPoint* localCoords,
-                                         const SkRect& bounds) {
-    this->initClassID<GrDrawVerticesBatch>();
+                                         const SkRect& bounds)
+    : INHERITED(ClassID()) {
     SkASSERT(positions);
 
     fBatch.fViewMatrix = viewMatrix;