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

ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm

Index: ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm
diff --git a/ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm b/ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm
index b3900d3f6bac474729efb95c61104492792fd641..5066802e2b5c001173263fcb017f25f0e18ce823 100644
--- a/ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm
+++ b/ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm
@@ -91,6 +91,16 @@ bool IOSChromePasswordManagerClient::PromptUserToSaveOrUpdatePassword(
   return true;
 }
 
+void IOSChromePasswordManagerClient::ShowManualFallback(
+    std::unique_ptr<password_manager::PasswordFormManager> form_to_save,
+    bool is_update) {
+  NOTIMPLEMENTED();
+}
+
+void IOSChromePasswordManagerClient::HideManualFallback() {
+  NOTIMPLEMENTED();
+}
+
 void IOSChromePasswordManagerClient::AutomaticPasswordSave(
     std::unique_ptr<PasswordFormManager> saved_form_manager) {
   NOTIMPLEMENTED();