Show Form-Not-Secure warning on page load

components/autofill/content/renderer/password_autofill_agent.h

Index: components/autofill/content/renderer/password_autofill_agent.h
diff --git a/components/autofill/content/renderer/password_autofill_agent.h b/components/autofill/content/renderer/password_autofill_agent.h
index f1201271d4014d8d621995d050f0dc1e3e432245..b6e31cd720984a0b7d18db95d0655f3ff72f0bf3 100644
--- a/components/autofill/content/renderer/password_autofill_agent.h
+++ b/components/autofill/content/renderer/password_autofill_agent.h
@@ -94,6 +94,11 @@ class PasswordAutofillAgent : public content::RenderFrameObserver,
                        bool show_all,
                        bool generation_popup_showing);
 
+  // Shows an Autofill popup with a warning that the form is not
+  // secure. This is an experimental UI that is shown when a password
+  // field is autofilled on a non-secure page on page load.
+  void ShowNotSecureWarning(const blink::WebInputElement& element);
+
   // Called when new form controls are inserted.
   void OnDynamicFormsSeen();