Use constexpr TaskTraits constructor in chrome.

chrome/browser/thumbnails/content_based_thumbnailing_algorithm.cc

Index: chrome/browser/thumbnails/content_based_thumbnailing_algorithm.cc
diff --git a/chrome/browser/thumbnails/content_based_thumbnailing_algorithm.cc b/chrome/browser/thumbnails/content_based_thumbnailing_algorithm.cc
index 67a00825fb3c583916f807a1b854a22beb3b9234..6559178599cd754149c4838ccfcaec648149a3ee 100644
--- a/chrome/browser/thumbnails/content_based_thumbnailing_algorithm.cc
+++ b/chrome/browser/thumbnails/content_based_thumbnailing_algorithm.cc
@@ -93,9 +93,8 @@ void ContentBasedThumbnailingAlgorithm::ProcessBitmap(
 
   base::PostTaskWithTraits(
       FROM_HERE,
-      base::TaskTraits()
-          .WithPriority(base::TaskPriority::BACKGROUND)
-          .WithShutdownBehavior(base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN),
+      {base::TaskPriority::BACKGROUND,
+       base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN},
       base::Bind(&CreateRetargetedThumbnail, source_bitmap,
                  target_thumbnail_size, context, callback));
 }