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

src/gpu/batches/GrStrokeRectBatch.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrStrokeRectBatch.h"
 #include "GrBatchTest.h"
 #include "SkRandom.h"
@@ skipping 110 matching lines @@
         vertex[4].set(args.fRect.fLeft, args.fRect.fTop);
     }
 
     GrVertices vertices;
     vertices.init(primType, vertexBuffer, firstVertex, vertexCount);
     batchTarget->draw(vertices);
 }
 
 #ifdef GR_TEST_UTILS
 
-BATCH_TEST_DEFINE(GrStrokeRectBatch) {
+DRAW_BATCH_TEST_DEFINE(GrStrokeRectBatch) {
     GrStrokeRectBatch::Geometry geometry;
     geometry.fViewMatrix = GrTest::TestMatrix(random);
     geometry.fColor = GrRandomColor(random);
     geometry.fRect = GrTest::TestRect(random);
     geometry.fStrokeWidth = random->nextBool() ? 0.0f : 1.0f;
 
     return GrStrokeRectBatch::Create(geometry, random->nextBool());
 }
 
 #endif