Use constexpr TaskTraits constructor in chrome.

chrome/browser/memory_details.cc

Index: chrome/browser/memory_details.cc
diff --git a/chrome/browser/memory_details.cc b/chrome/browser/memory_details.cc
index 2aa7b43d43003cb230b4bd2471125d01a7cef664..723fdac9579d611c72d66b1ad12784b7a7ef142b 100644
--- a/chrome/browser/memory_details.cc
+++ b/chrome/browser/memory_details.cc
@@ -216,11 +216,8 @@ void MemoryDetails::CollectChildInfoOnIOThread() {
   // 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));
 }