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

components/password_manager/core/browser/stub_password_manager_client.cc

Index: components/password_manager/core/browser/stub_password_manager_client.cc
diff --git a/components/password_manager/core/browser/stub_password_manager_client.cc b/components/password_manager/core/browser/stub_password_manager_client.cc
index f31ab3429a6100c91f47f5909d1c047bf1a35a24..232955ab75ecc704c27ea0fe34e317bf6e90ae36 100644
--- a/components/password_manager/core/browser/stub_password_manager_client.cc
+++ b/components/password_manager/core/browser/stub_password_manager_client.cc
@@ -27,6 +27,12 @@ bool StubPasswordManagerClient::PromptUserToSaveOrUpdatePassword(
   return false;
 }
 
+void StubPasswordManagerClient::ShowManualFallback(
+    std::unique_ptr<PasswordFormManager> form_to_save,
+    bool update_password) {}
+
+void StubPasswordManagerClient::HideManualFallback() {}
+
 bool StubPasswordManagerClient::PromptUserToChooseCredentials(
     std::vector<std::unique_ptr<autofill::PasswordForm>> local_forms,
     const GURL& origin,