NetworkPortalDetectorInterface class.

chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc

Index: chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc
diff --git a/chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc b/chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc
index 0d79aeed399fdf121ffbb1ba35a07bb004ce251c..1e363fea4c33e0561dd3b8db9721448e7008a190 100644
--- a/chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc
+++ b/chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc
@@ -98,8 +98,7 @@ void AutoEnrollmentCheckScreen::Show() {
           base::Bind(
               &AutoEnrollmentCheckScreen::OnAutoEnrollmentCheckProgressed,
               base::Unretained(this)));
-  NetworkPortalDetector* portal_detector = NetworkPortalDetector::Get();
-  portal_detector->AddObserver(this);
+  NetworkPortalDetector::Get()->AddObserver(this);
 
   // Perform an initial UI update.
   NetworkPortalDetector::CaptivePortalStatus new_captive_portal_status =
@@ -115,7 +114,7 @@ void AutoEnrollmentCheckScreen::Show() {
 
   // Make sure gears are in motion in the background.
   auto_enrollment_controller_->Start();
-  portal_detector->StartDetectionIfIdle();
+  NetworkPortalDetector::Get()->StartDetectionIfIdle();
 }
 
 void AutoEnrollmentCheckScreen::Hide() {