[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 b351cc428dedf0020318453a41af4a5846d21a4c..4116aadfc86bb82289cb300117a9a53d0b433498 100644
--- a/components/password_manager/core/browser/stub_password_manager_client.cc
+++ b/components/password_manager/core/browser/stub_password_manager_client.cc
@@ -24,6 +24,13 @@ bool StubPasswordManagerClient::PromptUserToSaveOrUpdatePassword(
   return false;
 }
 
+void StubPasswordManagerClient::ShowManualFallbackForSaving(
+    std::unique_ptr<PasswordFormManager> form_to_save,
+    bool has_generated_password,
+    bool update_password) {}
+
+void StubPasswordManagerClient::HideManualFallbackForSaving() {}
+
 bool StubPasswordManagerClient::PromptUserToChooseCredentials(
     std::vector<std::unique_ptr<autofill::PasswordForm>> local_forms,
     const GURL& origin,