[Cleanup] Const-correct the profile() method for the EasyUnlockService

chrome/browser/chromeos/login/saml/saml_offline_signin_limiter.cc

Index: chrome/browser/chromeos/login/saml/saml_offline_signin_limiter.cc
diff --git a/chrome/browser/chromeos/login/saml/saml_offline_signin_limiter.cc b/chrome/browser/chromeos/login/saml/saml_offline_signin_limiter.cc
index 42321e3a084c03758c6dda650f96e022d9b412b5..b5639d39ee171a574e4d17bbbf0a8104e5d1b951 100644
--- a/chrome/browser/chromeos/login/saml/saml_offline_signin_limiter.cc
+++ b/chrome/browser/chromeos/login/saml/saml_offline_signin_limiter.cc
@@ -141,7 +141,8 @@ void SAMLOfflineSigninLimiter::UpdateLimit() {
 }
 
 void SAMLOfflineSigninLimiter::ForceOnlineLogin() {
-  user_manager::User* user = ProfileHelper::Get()->GetUserByProfile(profile_);
+  const user_manager::User* user =
+      ProfileHelper::Get()->GetUserByProfile(profile_);
   if (!user) {
     NOTREACHED();
     return;