Use constexpr TaskTraits constructor in chrome.

chrome/browser/memory_details.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/memory_details.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/bind.h"
@@ skipping 198 matching lines @@
 
     info.process_type = iter.GetData().process_type;
     info.renderer_type = ProcessMemoryInformation::RENDERER_UNKNOWN;
     info.titles.push_back(iter.GetData().name);
     child_info.push_back(info);
   }
 
   // Now go do expensive memory lookups in a thread pool.
   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(&MemoryDetails::CollectProcessData, this, child_info));
 }
 
 void MemoryDetails::CollectChildInfoOnUIThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   ProcessData* const chrome_browser = ChromeBrowser();
 
   // First pass, collate the widgets by process ID.
   std::map<base::ProcessId, std::vector<RenderWidgetHost*>> widgets_by_pid;
   std::unique_ptr<content::RenderWidgetHostIterator> widget_it(
@@ skipping 124 matching lines @@
   // Get rid of other Chrome processes that are from a different profile.
   auto is_unknown = [](ProcessMemoryInformation& process) {
     return process.process_type == content::PROCESS_TYPE_UNKNOWN;
   };
   auto& vector = chrome_browser->processes;
   vector.erase(std::remove_if(vector.begin(), vector.end(), is_unknown),
                vector.end());
 
   OnDetailsAvailable();
 }