Implement 'Not secure' warning for non-secure pages in Incognito mode

ios/chrome/browser/ssl/ios_security_state_tab_helper.mm

Index: ios/chrome/browser/ssl/ios_security_state_tab_helper.mm
diff --git a/ios/chrome/browser/ssl/ios_security_state_tab_helper.mm b/ios/chrome/browser/ssl/ios_security_state_tab_helper.mm
index c4634660888ef58e851462c958bc0cc6df82f97c..4d79542f71a0494603f68f6f717a293ce62cba21 100644
--- a/ios/chrome/browser/ssl/ios_security_state_tab_helper.mm
+++ b/ios/chrome/browser/ssl/ios_security_state_tab_helper.mm
@@ -10,6 +10,7 @@
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram_macros.h"
 #include "components/security_state/core/security_state.h"
+#include "ios/web/public/browser_state.h"
 #include "ios/web/public/navigation_item.h"
 #import "ios/web/public/navigation_manager.h"
 #import "ios/web/public/origin_util.h"
@@ -62,5 +63,7 @@ IOSSecurityStateTabHelper::GetVisibleSecurityState() const {
       (ssl.content_status & web::SSLStatus::DISPLAYED_CREDIT_CARD_FIELD_ON_HTTP)
           ? true
           : false;
+  state->is_incognito = web_state_->GetBrowserState()->IsOffTheRecord();
+
   return state;
 }