Use constexpr TaskTraits constructor in components.

components/web_restrictions/browser/web_restrictions_client.cc

 // Copyright 2015 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 "components/web_restrictions/browser/web_restrictions_client.h"
 
 #include "base/android/jni_string.h"
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 77 matching lines @@
   // Initialize the content resolver.
   initialized_ = !content_provider_authority.empty();
   if (!initialized_)
     return;
   java_provider_.Reset(Java_WebRestrictionsClient_create(
       env,
       base::android::ConvertUTF8ToJavaString(env, content_provider_authority),
       reinterpret_cast<jlong>(this)));
   supports_request_ = false;
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::BACKGROUND),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::BACKGROUND},
       base::Bind(&CheckSupportsRequestTask, java_provider_),
       base::Bind(&WebRestrictionsClient::RequestSupportKnown,
                  base::Unretained(this), provider_authority_));
 }
 
 UrlAccess WebRestrictionsClient::ShouldProceed(
     bool is_main_frame,
     const std::string& url,
     const base::Callback<void(bool)>& callback) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
@@ skipping 134 matching lines @@
   base::AutoLock lock(lock_);
   cache_data_.erase(url);
 }
 
 void WebRestrictionsClient::Cache::Clear() {
   base::AutoLock lock(lock_);
   cache_data_.clear();
 }
 
 }  // namespace web_restrictions