[Password Manager] Show omnibox icon and anchored prompt once user start typing password

components/autofill/content/renderer/password_autofill_agent.cc

Index: components/autofill/content/renderer/password_autofill_agent.cc
diff --git a/components/autofill/content/renderer/password_autofill_agent.cc b/components/autofill/content/renderer/password_autofill_agent.cc
index 83c717d1329ba2ba0d4f8dd78b4ce883ac16203a..fab84fc0ec8d99e1d3596d40e434e95c6284c455 100644
--- a/components/autofill/content/renderer/password_autofill_agent.cc
+++ b/components/autofill/content/renderer/password_autofill_agent.cc
@@ -1774,13 +1774,21 @@ void PasswordAutofillAgent::ProvisionallySavePassword(
     const blink::WebFormElement& form,
     const blink::WebInputElement& input,
     ProvisionallySaveRestriction restriction) {
-  if (!password_form || (restriction == RESTRICTION_NON_EMPTY_PASSWORD &&
-                         password_form->password_value.empty() &&
-                         password_form->new_password_value.empty())) {
+  if (!password_form)
     return;
-  }
+  bool has_no_password = password_form->password_value.empty() &&
+                         password_form->new_password_value.empty();
+  if (restriction == RESTRICTION_NON_EMPTY_PASSWORD && has_no_password)
+    return;
+
   DCHECK(password_form && (!form.IsNull() || !input.IsNull()));
   provisionally_saved_form_.Set(std::move(password_form), form, input);
+  if (!has_no_password) {
+    GetPasswordManagerDriver()->ShowManualFallbackForSaving(
+        provisionally_saved_form_.password_form());
+  } else {
+    GetPasswordManagerDriver()->HideManualFallbackForSaving();
+  }
 }
 
 const mojom::AutofillDriverPtr& PasswordAutofillAgent::GetAutofillDriver() {