Use constexpr TaskTraits constructor in chrome.

chrome/browser/profiles/profile_impl_io_data.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/profiles/profile_impl_io_data.h"
 
 #include <memory>
 #include <set>
 #include <string>
 #include <utility>
@@ skipping 489 matching lines @@
   cookie_config.crypto_delegate = cookie_config::GetCookieCryptoDelegate();
   main_context_storage->set_cookie_store(
       content::CreateCookieStore(cookie_config));
 
   // Set up server bound cert service.
   DCHECK(!lazy_params_->channel_id_path.empty());
   scoped_refptr<QuotaPolicyChannelIDStore> channel_id_db =
       new QuotaPolicyChannelIDStore(
           lazy_params_->channel_id_path,
           base::CreateSequencedTaskRunnerWithTraits(
-              base::TaskTraits().MayBlock().WithPriority(
-                  base::TaskPriority::BACKGROUND)),
+              {base::MayBlock(), base::TaskPriority::BACKGROUND}),
           lazy_params_->special_storage_policy.get());
   main_context_storage->set_channel_id_service(
       base::MakeUnique<net::ChannelIDService>(
           new net::DefaultChannelIDStore(channel_id_db.get())));
 
   main_context->cookie_store()->SetChannelIDServiceID(
       main_context->channel_id_service()->GetUniqueID());
 
   std::unique_ptr<net::HttpCache::BackendFactory> main_backend(
       new net::HttpCache::DefaultBackend(
@@ skipping 126 matching lines @@
 
     // TODO(creis): We should have a cookie delegate for notifying the cookie
     // extensions API, but we need to update it to understand isolated apps
     // first.
     content::CookieStoreConfig cookie_config(
         cookie_path, content::CookieStoreConfig::EPHEMERAL_SESSION_COOKIES,
         nullptr, nullptr);
     cookie_config.crypto_delegate = cookie_config::GetCookieCryptoDelegate();
     cookie_store = content::CreateCookieStore(cookie_config);
     channel_id_db = new net::SQLiteChannelIDStore(
-        channel_id_path, base::CreateSequencedTaskRunnerWithTraits(
-                             base::TaskTraits().MayBlock().WithPriority(
-                                 base::TaskPriority::BACKGROUND)));
+        channel_id_path,
+        base::CreateSequencedTaskRunnerWithTraits(
+            {base::MayBlock(), base::TaskPriority::BACKGROUND}));
   }
   std::unique_ptr<net::ChannelIDService> channel_id_service(
       new net::ChannelIDService(
           new net::DefaultChannelIDStore(channel_id_db.get())));
   cookie_store->SetChannelIDServiceID(channel_id_service->GetUniqueID());
 
   // Build a new HttpNetworkSession that uses the new ChannelIDService.
   // TODO(mmenke):  It weird to combine state from
   // main_request_context_storage() objects and the argumet to this method,
   // |main_context|.  Remove |main_context| as an argument, and just use
@@ skipping 136 matching lines @@
     const base::Closure& completion) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DCHECK(initialized());
 
   DCHECK(transport_security_state());
   // Completes synchronously.
   transport_security_state()->DeleteAllDynamicDataSince(time);
   DCHECK(http_server_properties_manager_);
   http_server_properties_manager_->Clear(completion);
 }