Observe visibility of password inputs, for HTTP-bad phase 1

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 aec6edf04c4f719ba27eded249e4a7a283072aaa..426d8c4e5cd5b7f38727d969363e10d53387c263 100644
--- a/components/autofill/content/renderer/password_autofill_agent.h
+++ b/components/autofill/content/renderer/password_autofill_agent.h
@@ -102,6 +102,9 @@ class PasswordAutofillAgent : public content::RenderFrameObserver,
   // a form has been submitted by AJAX without navigation.
   void AJAXSucceeded();
 
+  // Called when a password field in the frame becomes visible.
+  void OnPasswordFieldVisible();
+
   // Called when the user first interacts with the page after a load. This is a
   // signal to make autofilled values of password input elements accessible to
   // JavaScript.