Use TaskScheduler instead of blocking pool in quota_policy_cookie_store.cc.

content/browser/net/quota_policy_cookie_store.cc

Index: content/browser/net/quota_policy_cookie_store.cc
diff --git a/content/browser/net/quota_policy_cookie_store.cc b/content/browser/net/quota_policy_cookie_store.cc
index 93f3f025c03f1e4af17db8ece1117292aba57427..0c931e2ea858de338b244a6fe4291365c7e174c1 100644
--- a/content/browser/net/quota_policy_cookie_store.cc
+++ b/content/browser/net/quota_policy_cookie_store.cc
@@ -13,7 +13,7 @@
 #include "base/files/file_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/profiler/scoped_tracker.h"
-#include "base/threading/sequenced_worker_pool.h"
+#include "base/task_scheduler/post_task.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/cookie_store_factory.h"
 #include "net/cookies/canonical_cookie.h"
@@ -154,9 +154,9 @@ std::unique_ptr<net::CookieStore> CreateCookieStore(
     }
 
     if (!background_task_runner.get()) {
-      background_task_runner =
-          BrowserThread::GetBlockingPool()->GetSequencedTaskRunner(
-              base::SequencedWorkerPool::GetSequenceToken());
+      background_task_runner = base::CreateSequencedTaskRunnerWithTraits(
+          base::TaskTraits().MayBlock().WithPriority(
+              base::TaskPriority::BACKGROUND));
     }
 
     scoped_refptr<net::SQLitePersistentCookieStore> sqlite_store(