iOS: Mark HTTP pages with password fields with an omnibox icon.

ios/web/web_state/web_state_impl.mm

Index: ios/web/web_state/web_state_impl.mm
diff --git a/ios/web/web_state/web_state_impl.mm b/ios/web/web_state/web_state_impl.mm
index 9d2dfa4d3c836195eac6da403adeeb627c628f14..42a8925703d86ff654cf10af090b2220e8d4c550 100644
--- a/ios/web/web_state/web_state_impl.mm
+++ b/ios/web/web_state/web_state_impl.mm
@@ -361,6 +361,10 @@ WebInterstitial* WebStateImpl::GetWebInterstitial() const {
   return interstitial_;
 }
 
+void WebStateImpl::OnPasswordInputShownOnHttp() {
+  [web_controller_ didShowPasswordInputOnHTTP];
+}
+
 net::HttpResponseHeaders* WebStateImpl::GetHttpResponseHeaders() const {
   return http_response_headers_.get();
 }