Use constexpr TaskTraits constructor in chrome.

chrome/browser/safe_browsing/download_protection_service.cc

Index: chrome/browser/safe_browsing/download_protection_service.cc
diff --git a/chrome/browser/safe_browsing/download_protection_service.cc b/chrome/browser/safe_browsing/download_protection_service.cc
index 021bd1cc4d2ae4dfb47218d73dce5d2518007abb..6681ae3ea1453e15681cca7583c4fe4d0fb80954 100644
--- a/chrome/browser/safe_browsing/download_protection_service.cc
+++ b/chrome/browser/safe_browsing/download_protection_service.cc
@@ -671,11 +671,8 @@ class DownloadProtectionService::CheckClientDownloadRequest
     // The task does not need to block shutdown.
     base::PostTaskWithTraits(
         FROM_HERE,
-        base::TaskTraits()
-            .MayBlock()
-            .WithPriority(base::TaskPriority::BACKGROUND)
-            .WithShutdownBehavior(
-                base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN),
+        {base::MayBlock(), base::TaskPriority::BACKGROUND,
+         base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN},
         base::BindOnce(&CheckClientDownloadRequest::ExtractFileFeatures, this,
                        item_->GetFullPath()));
   }