[Refactor] Use ScopedTestPublicSessionLoginState in code

chrome/browser/extensions/api/web_request/web_request_apitest.cc

Index: chrome/browser/extensions/api/web_request/web_request_apitest.cc
diff --git a/chrome/browser/extensions/api/web_request/web_request_apitest.cc b/chrome/browser/extensions/api/web_request/web_request_apitest.cc
index ef400b6a0e2ec76571b6887d8d6f5d70535f2775..519dedd6cfea151835651269ca22272802dbb005 100644
--- a/chrome/browser/extensions/api/web_request/web_request_apitest.cc
+++ b/chrome/browser/extensions/api/web_request/web_request_apitest.cc
@@ -22,6 +22,7 @@
 #include "chrome/common/extensions/extension_process_policy.h"
 #include "chrome/test/base/search_test_utils.h"
 #include "chrome/test/base/ui_test_utils.h"
+#include "chromeos/login/scoped_test_public_session_login_state.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_frame_host.h"
@@ -170,10 +171,7 @@ IN_PROC_BROWSER_TEST_F(ExtensionWebRequestApiTest, WebRequestTypes) {
 #if defined(OS_CHROMEOS)
 IN_PROC_BROWSER_TEST_F(ExtensionWebRequestApiTest, WebRequestPublicSession) {
   ASSERT_TRUE(StartEmbeddedTestServer());
-  // Set Public Session state.
-  chromeos::LoginState::Get()->SetLoggedInState(
-      chromeos::LoginState::LOGGED_IN_ACTIVE,
-      chromeos::LoginState::LOGGED_IN_USER_PUBLIC_ACCOUNT);
+  chromeos::ScopedTestPublicSessionLoginState login_state;
   // Disable a CHECK while doing api tests.
   WebRequestPermissions::AllowAllExtensionLocationsInPublicSessionForTesting(
       true);