Use constexpr TaskTraits constructor in content.

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index b6c7631c744cd0d7965191fd7105db39b4a6fbda..e3450e5e089d151cb5eae59aa257888760fb8ecf 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -247,11 +247,8 @@ std::unique_ptr<cc::LayerTreeHost> RenderWidgetCompositor::CreateLayerTreeHost(
     // shared memory allocations which need to make synchronous calls to the
     // IO thread.
     params.image_worker_task_runner = base::CreateSequencedTaskRunnerWithTraits(
-        base::TaskTraits()
-            .WithPriority(base::TaskPriority::BACKGROUND)
-            .WithShutdownBehavior(
-                base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN)
-            .WithBaseSyncPrimitives());
+        {base::WithBaseSyncPrimitives(), base::TaskPriority::BACKGROUND,
+         base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN});
   }
   if (!is_threaded) {
     // Single-threaded layout tests.