Update supervised user interstitial pages.

chrome/browser/supervised_user/supervised_user_interstitial.cc

Index: chrome/browser/supervised_user/supervised_user_interstitial.cc
diff --git a/chrome/browser/supervised_user/supervised_user_interstitial.cc b/chrome/browser/supervised_user/supervised_user_interstitial.cc
index 5958869c8cf4994b90aa60c15b80b3d1fea0f5f2..d150be1b7a0004e155ad1dd90f0fc16a0b442540 100644
--- a/chrome/browser/supervised_user/supervised_user_interstitial.cc
+++ b/chrome/browser/supervised_user/supervised_user_interstitial.cc
@@ -267,6 +267,7 @@ void SupervisedUserInterstitial::CommandReceived(const std::string& command) {
     std::string message = l10n_util::GetStringFUTF8(
         IDS_BLOCK_INTERSTITIAL_DEFAULT_FEEDBACK_TEXT, reason);
 #if defined(OS_ANDROID)
+    DCHECK(profile_->IsChild());
     ReportChildAccountFeedback(web_contents_, message, url_);
 #else
     chrome::ShowFeedbackPage(chrome::FindBrowserWithWebContents(web_contents_),