Use constexpr TaskTraits constructor in chrome.

chrome/browser/safe_browsing/safe_browsing_service.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 
 #include <stddef.h>
 
 #include <vector>
 
@@ skipping 177 matching lines @@
             CookieFilePath(),
             content::CookieStoreConfig::EPHEMERAL_SESSION_COOKIES, nullptr,
             nullptr));
 
     safe_browsing_request_context_->set_cookie_store(
         safe_browsing_cookie_store_.get());
 
     // 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(
         channel_id_service_.get());
     safe_browsing_cookie_store_->SetChannelIDServiceID(
         channel_id_service_->GetUniqueID());
 
     // Rebuild the HttpNetworkSession and the HttpTransactionFactory to use the
     // new ChannelIDService.
     if (safe_browsing_request_context_->http_transaction_factory() &&
@@ skipping 559 matching lines @@
 
 void SafeBrowsingService::RemovePasswordProtectionService(Profile* profile) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DCHECK(profile);
   auto it = password_protection_service_map_.find(profile);
   if (it != password_protection_service_map_.end())
     password_protection_service_map_.erase(it);
 }
 
 }  // namespace safe_browsing