Use TaskScheduler instead of WorkerPool in easy_unlock_tpm_key_manager.cc.

chrome/browser/chromeos/login/easy_unlock/easy_unlock_tpm_key_manager_unittest.cc

Index: chrome/browser/chromeos/login/easy_unlock/easy_unlock_tpm_key_manager_unittest.cc
diff --git a/chrome/browser/chromeos/login/easy_unlock/easy_unlock_tpm_key_manager_unittest.cc b/chrome/browser/chromeos/login/easy_unlock/easy_unlock_tpm_key_manager_unittest.cc
index 76aae0c16aa8b3f4bf4c580fc40381b399dea7d7..c682c2ed1bedbbef97a0b86b8494bc8cc8c91606 100644
--- a/chrome/browser/chromeos/login/easy_unlock/easy_unlock_tpm_key_manager_unittest.cc
+++ b/chrome/browser/chromeos/login/easy_unlock/easy_unlock_tpm_key_manager_unittest.cc
@@ -9,6 +9,7 @@
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/test/scoped_task_scheduler.h"
 #include "chrome/browser/chromeos/login/easy_unlock/easy_unlock_tpm_key_manager.h"
 #include "chrome/browser/chromeos/login/easy_unlock/easy_unlock_tpm_key_manager_factory.h"
 #include "chrome/browser/chromeos/login/users/fake_chrome_user_manager.h"
@@ -336,6 +337,7 @@ class EasyUnlockTpmKeyManagerTest : public testing::Test {
   const AccountId test_account_id_ = AccountId::FromUserEmail(kTestUserId);
 
  private:
+  base::test::ScopedTaskScheduler scoped_task_scheduler_;
   content::TestBrowserThreadBundle thread_bundle_;
 
   // The NSS system slot used by EasyUnlockTPMKeyManagers in tests.