Introduce GrBatch subclasses GrDrawBatch and GrVertexBatch to prepare for non-drawing batches

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 "GrBatch.h"
 #include "GrColor.h"
 #include "GrTypes.h"
 #include "SkMatrix.h"
 #include "SkRect.h"
 #include "SkTDArray.h"
 
 class GrBatchTarget;
 struct GrInitInvariantOutput;
 
-class GrDrawVerticesBatch : public GrBatch {
+class GrDrawVerticesBatch : public GrVertexBatch {
 public:
     struct Geometry {
         GrColor fColor;
         SkTDArray<SkPoint> fPositions;
         SkTDArray<uint16_t> fIndices;
         SkTDArray<GrColor> fColors;
         SkTDArray<SkPoint> fLocalCoords;
     };
 
-    static GrBatch* Create(const Geometry& geometry, GrPrimitiveType primitiveType,
-                           const SkMatrix& viewMatrix,
-                           const SkPoint* positions, int vertexCount,
-                           const uint16_t* indices, int indexCount,
-                           const GrColor* colors, const SkPoint* localCoords,
-                           const SkRect& bounds) {
+    static GrDrawBatch* Create(const Geometry& geometry, GrPrimitiveType primitiveType,
+                               const SkMatrix& viewMatrix,
+                               const SkPoint* positions, int vertexCount,
+                               const uint16_t* indices, int indexCount,
+                               const GrColor* colors, const SkPoint* localCoords,
+                               const SkRect& bounds) {
         return SkNEW_ARGS(GrDrawVerticesBatch, (geometry, primitiveType, viewMatrix, positions,
                                                 vertexCount, indices, indexCount, colors,
                                                 localCoords, bounds));
     }
 
     const char* name() const override { return "DrawVerticesBatch"; }
 
     void getInvariantOutputColor(GrInitInvariantOutput* out) const override;
 
     void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override;
@@ skipping 42 matching lines @@
         bool fHasLocalCoords;
         int fVertexCount;
         int fIndexCount;
     };
 
     BatchTracker fBatch;
     SkSTArray<1, Geometry, true> fGeoData;
 };
 
 #endif