[Refactor] Use ScopedTestPublicSessionLoginState in code

chrome/browser/chromeos/extensions/permissions_updater_delegate_chromeos_unittest.cc

Index: chrome/browser/chromeos/extensions/permissions_updater_delegate_chromeos_unittest.cc
diff --git a/chrome/browser/chromeos/extensions/permissions_updater_delegate_chromeos_unittest.cc b/chrome/browser/chromeos/extensions/permissions_updater_delegate_chromeos_unittest.cc
index 081648ce87f3a9bb2009d4be63562c16b81ed793..49499a86d1bfbe1d97f11b0ebc8d66bdb2ce6af2 100644
--- a/chrome/browser/chromeos/extensions/permissions_updater_delegate_chromeos_unittest.cc
+++ b/chrome/browser/chromeos/extensions/permissions_updater_delegate_chromeos_unittest.cc
@@ -10,6 +10,7 @@
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
 #include "chromeos/login/login_state.h"
+#include "chromeos/login/scoped_test_public_session_login_state.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest.h"
 #include "extensions/common/manifest_constants.h"
@@ -85,12 +86,8 @@ TEST(PermissionsUpdaterDelegateChromeOSTest, NoFilteringOutsidePublicSession) {
 
 TEST(PermissionsUpdaterDelegateChromeOSTest,
      FilterNonWhitelistedInsidePublicSession) {
+  chromeos::ScopedTestPublicSessionLoginState login_state;
   PermissionsUpdaterDelegateChromeOS delegate;
-  // Set Public Session state.
-  chromeos::LoginState::Initialize();
-  chromeos::LoginState::Get()->SetLoggedInState(
-    chromeos::LoginState::LOGGED_IN_ACTIVE,
-    chromeos::LoginState::LOGGED_IN_USER_PUBLIC_ACCOUNT);
 
   // Whitelisted extension, nothing gets filtered.
   auto extension = CreateExtension(kWhitelistedId);
@@ -104,9 +101,6 @@ TEST(PermissionsUpdaterDelegateChromeOSTest,
   granted_permissions = CreatePermissions();
   delegate.InitializePermissions(extension.get(), &granted_permissions);
   EXPECT_EQ(*CreatePermissions(false), *granted_permissions);
-
-  // Reset state at the end of test.
-  chromeos::LoginState::Shutdown();
 }
 
 }  // namespace extensions