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

src/gpu/batches/GrTInstanceBatch.h

Index: src/gpu/batches/GrTInstanceBatch.h
diff --git a/src/gpu/batches/GrTInstanceBatch.h b/src/gpu/batches/GrTInstanceBatch.h
index 5f9a6c5fdbb9d8925d5c5116cf0569b0b6343c5a..9fe0339ab58d8c1fbedc480a3145feb029fa23af 100644
--- a/src/gpu/batches/GrTInstanceBatch.h
+++ b/src/gpu/batches/GrTInstanceBatch.h
@@ -96,7 +96,7 @@ private:
             return;
         }
 
-        target->initDraw(gp, this->pipeline());
+        target->initDraw(gp, kTriangles_GrPrimitiveType);
 
         size_t vertexStride = gp->getVertexStride();
         int instanceCount = fGeoData.count();
@@ -104,8 +104,7 @@ private:
         SkAutoTUnref<const GrIndexBuffer> indexBuffer(
                 Impl::GetIndexBuffer(target->resourceProvider()));
         InstancedHelper helper;
-        void* vertices = helper.init(target, kTriangles_GrPrimitiveType, vertexStride,
-                                     indexBuffer, Impl::kVertsPerInstance,
+        void* vertices = helper.init(target, vertexStride, indexBuffer, Impl::kVertsPerInstance,
                                      Impl::kIndicesPerInstance, instanceCount);
         if (!vertices || !indexBuffer) {
             SkDebugf("Could not allocate vertices\n");