Use constexpr TaskTraits constructor in extensions.

extensions/browser/image_loader.cc

 // Copyright 2014 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 "extensions/browser/image_loader.h"
 
 #include <stddef.h>
 
 #include <map>
 #include <vector>
@@ skipping 247 matching lines @@
   }
   LoadImagesAsync(extension, info_list, callback);
 }
 
 void ImageLoader::LoadImagesAsync(
     const Extension* extension,
     const std::vector<ImageRepresentation>& info_list,
     const ImageLoaderImageCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::USER_VISIBLE),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::USER_VISIBLE},
       base::Bind(LoadImagesBlocking, info_list,
                  LoadResourceBitmaps(extension, info_list)),
       base::Bind(&ImageLoader::ReplyBack, weak_ptr_factory_.GetWeakPtr(),
                  callback));
 }
 
 void ImageLoader::LoadImageFamilyAsync(
     const Extension* extension,
     const std::vector<ImageRepresentation>& info_list,
     const ImageLoaderImageFamilyCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::USER_VISIBLE),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::USER_VISIBLE},
       base::Bind(LoadImagesBlocking, info_list,
                  LoadResourceBitmaps(extension, info_list)),
       base::Bind(&ImageLoader::ReplyBackWithImageFamily,
                  weak_ptr_factory_.GetWeakPtr(), callback));
 }
 
 void ImageLoader::ReplyBack(const ImageLoaderImageCallback& callback,
                             const std::vector<LoadResult>& load_result) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
@@ skipping 43 matching lines @@
        it != image_skia_map.end();
        ++it) {
     it->second.MakeThreadSafe();
     image_family.Add(it->second);
   }
 
   callback.Run(image_family);
 }
 
 }  // namespace extensions