Use constexpr TaskTraits constructor in chrome.

chrome/browser/safe_browsing/safe_browsing_service.cc

Index: chrome/browser/safe_browsing/safe_browsing_service.cc
diff --git a/chrome/browser/safe_browsing/safe_browsing_service.cc b/chrome/browser/safe_browsing/safe_browsing_service.cc
index 678692f5401ea52cbabb9d7f72129ec631306179..a4ce33327494b4293c43be5d9564fb9d58f38e36 100644
--- a/chrome/browser/safe_browsing/safe_browsing_service.cc
+++ b/chrome/browser/safe_browsing/safe_browsing_service.cc
@@ -195,9 +195,9 @@ SafeBrowsingURLRequestContextGetter::GetURLRequestContext() {
     // Set up the ChannelIDService
     scoped_refptr<net::SQLiteChannelIDStore> channel_id_db =
         new net::SQLiteChannelIDStore(
-            ChannelIDFilePath(), base::CreateSequencedTaskRunnerWithTraits(
-                                     base::TaskTraits().MayBlock().WithPriority(
-                                         base::TaskPriority::BACKGROUND)));
+            ChannelIDFilePath(),
+            base::CreateSequencedTaskRunnerWithTraits(
+                {base::MayBlock(), base::TaskPriority::BACKGROUND}));
     channel_id_service_.reset(new net::ChannelIDService(
         new net::DefaultChannelIDStore(channel_id_db.get())));
     safe_browsing_request_context_->set_channel_id_service(