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

src/gpu/batches/GrTestBatch.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 GrTestBatch_DEFINED
 #define GrTestBatch_DEFINED
 
 #include "GrVertexBuffer.h"
 
 #include "batches/GrBatch.h"
 
 /*
  * A simple batch only for testing purposes which actually doesn't batch at all, but can fit into
  * the batch pipeline and generate arbitrary geometry
  */
-class GrTestBatch : public GrBatch {
+class GrTestBatch : public GrVertexBatch {
 public:
     struct Geometry {
         GrColor fColor;
     };
 
     virtual const char* name() const override = 0;
 
     void getInvariantOutputColor(GrInitInvariantOutput* out) const override {
         // When this is called on a batch, there is only one geometry bundle
         out->setKnownFourComponents(this->geoData(0)->fColor);
@@ skipping 47 matching lines @@
         bool fUsesLocalCoords;
         bool fColorIgnored;
         bool fCoverageIgnored;
     };
 
     SkAutoTUnref<const GrGeometryProcessor> fGeometryProcessor;
     BatchTracker fBatch;
 };
 
 #endif