Update how we send draws to gpu backend to reduce state setting.

src/gpu/batches/GrVertexBatch.h

Index: src/gpu/batches/GrVertexBatch.h
diff --git a/src/gpu/batches/GrVertexBatch.h b/src/gpu/batches/GrVertexBatch.h
index d0daf591412382c98cf3535b04a9c6f1e402ee32..40a69ac542b4a41af9825a869fea1fce996042ff 100644
--- a/src/gpu/batches/GrVertexBatch.h
+++ b/src/gpu/batches/GrVertexBatch.h
@@ -34,7 +34,7 @@ protected:
         InstancedHelper() {}
         /** Returns the allocated storage for the vertices. The caller should populate the before
             vertices before calling issueDraws(). */
-        void* init(Target*, GrPrimitiveType, size_t vertexStride,
+        void* init(Target*, size_t vertexStride,
                    const GrIndexBuffer*, int verticesPerInstance, int indicesPerInstance,
                    int instancesToDraw);
 
@@ -73,6 +73,7 @@ private:
     struct DrawArray {
         SkSTArray<1, GrVertices, true>                      fDraws;
         GrPendingProgramElement<const GrPrimitiveProcessor> fPrimitiveProcessor;
+        GrPrimitiveType                                     fPrimitiveType;
     };
 
     // Array of DrawArray. There may be inline uploads between each DrawArray and each DrawArray