Use constexpr TaskTraits constructor in net.

net/disk_cache/cache_util.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 "net/disk_cache/cache_util.h"
 
 #include <limits>
 
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
@@ skipping 118 matching lines @@
     LOG(ERROR) << "Unable to get another cache folder";
     return false;
   }
 
   if (!disk_cache::MoveCache(full_path, to_delete)) {
     LOG(ERROR) << "Unable to move cache folder " << full_path.value() << " to "
                << to_delete.value();
     return false;
   }
 
-  base::PostTaskWithTraits(
-      FROM_HERE, base::TaskTraits()
-                     .MayBlock()
-                     .WithPriority(base::TaskPriority::BACKGROUND)
-                     .WithShutdownBehavior(
-                         base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN),
-      base::Bind(&CleanupCallback, path, name_str));
+  base::PostTaskWithTraits(FROM_HERE,
+                           {base::MayBlock(), base::TaskPriority::BACKGROUND,
+                            base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN},
+                           base::Bind(&CleanupCallback, path, name_str));
   return true;
 }
 
 // Returns the preferred maximum number of bytes for the cache given the
 // number of available bytes.
 int PreferredCacheSize(int64_t available) {
   if (available < 0)
     return kDefaultCacheSize;
 
   // Limit cache size to somewhat less than kint32max to avoid potential
   // integer overflows in cache backend implementations.
   DCHECK_LT(kDefaultCacheSize * 4, std::numeric_limits<int32_t>::max());
   return static_cast<int32_t>(
       std::min(PreferredCacheSizeInternal(available),
                static_cast<int64_t>(kDefaultCacheSize * 4)));
 }
 
 }  // namespace disk_cache