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

ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/passwords/ios_chrome_password_manager_client.h"
 
 #include <memory>
 #include <utility>
 
 #include "components/autofill/core/common/password_form.h"
@@ skipping 73 matching lines @@
 
   if (update_password) {
     [delegate_ showUpdatePasswordInfoBar:std::move(form_to_save)];
   } else {
     [delegate_ showSavePasswordInfoBar:std::move(form_to_save)];
   }
 
   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();
 }
 
 bool IOSChromePasswordManagerClient::IsIncognito() const {
   return (delegate_.browserState)->IsOffTheRecord();
 }
 
 PrefService* IOSChromePasswordManagerClient::GetPrefs() {
@@ skipping 58 matching lines @@
 
 PasswordManagerMetricsRecorder&
 IOSChromePasswordManagerClient::GetMetricsRecorder() {
   if (!metrics_recorder_) {
     metrics_recorder_.emplace(PasswordManagerMetricsRecorder(
         PasswordManagerMetricsRecorder::CreateUkmEntryBuilder(
             GetUkmRecorder(), GetUkmSourceId())));
   }
   return metrics_recorder_.value();
 }