Reland of add a ClassID function to GrBatch

src/gpu/batches/GrDrawVerticesBatch.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrDrawVerticesBatch_DEFINED
 #define GrDrawVerticesBatch_DEFINED
 
 #include "GrColor.h"
 #include "GrTypes.h"
 #include "GrVertexBatch.h"
 #include "SkMatrix.h"
 #include "SkRect.h"
 #include "SkTDArray.h"
 
 class GrBatchFlushState;
 struct GrInitInvariantOutput;
 
 class GrDrawVerticesBatch : public GrVertexBatch {
 public:
+    DEFINE_BATCH_CLASS_ID
+
     struct Geometry {
         GrColor fColor;
         SkTDArray<SkPoint> fPositions;
         SkTDArray<uint16_t> fIndices;
         SkTDArray<GrColor> fColors;
         SkTDArray<SkPoint> fLocalCoords;
     };
 
     static GrDrawBatch* Create(const Geometry& geometry, GrPrimitiveType primitiveType,
                                const SkMatrix& viewMatrix,
@@ skipping 51 matching lines @@
         bool fCoverageIgnored;
         bool fHasColors;
         bool fHasIndices;
         bool fHasLocalCoords;
         int fVertexCount;
         int fIndexCount;
     };
 
     BatchTracker fBatch;
     SkSTArray<1, Geometry, true> fGeoData;
+
+    typedef GrVertexBatch INHERITED;
 };
 
 #endif