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

src/gpu/batches/GrStrokeRectBatch.cpp

Index: src/gpu/batches/GrStrokeRectBatch.cpp
diff --git a/src/gpu/batches/GrStrokeRectBatch.cpp b/src/gpu/batches/GrStrokeRectBatch.cpp
index 9c31149a5b2c41d1eacfb2e8dbd0753c122497f9..649ba01ddda8d2811abcf7993fac62b2e63f9fe0 100644
--- a/src/gpu/batches/GrStrokeRectBatch.cpp
+++ b/src/gpu/batches/GrStrokeRectBatch.cpp
@@ -128,7 +128,7 @@ void GrStrokeRectBatch::generateGeometry(GrBatchTarget* batchTarget) {
 
 #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);