Enable Update Password UI on iOS behind a flag

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"
 #include "components/browser_sync/browser/profile_sync_service.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/password_manager/core/browser/password_form_manager.h"
 #include "components/password_manager/core/browser/password_manager_util.h"
 #include "components/password_manager/core/common/password_manager_pref_names.h"
 #include "components/signin/core/browser/signin_manager_base.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#include "ios/chrome/browser/experimental_flags.h"
 #include "ios/chrome/browser/passwords/ios_chrome_password_store_factory.h"
 #include "ios/chrome/browser/signin/signin_manager_factory.h"
 #include "ios/chrome/browser/sync/ios_chrome_profile_sync_service_factory.h"
 #include "url/gurl.h"
 
 using password_manager::PasswordFormManager;
 using password_manager::PasswordStore;
 using password_manager::PasswordSyncState;
 
 namespace {
@@ skipping 39 matching lines @@
   NOTIMPLEMENTED();
   return false;
 }
 
 bool IOSChromePasswordManagerClient::PromptUserToSaveOrUpdatePassword(
     std::unique_ptr<PasswordFormManager> form_to_save,
     password_manager::CredentialSourceType type,
     bool update_password) {
   if (form_to_save->IsBlacklisted())
     return false;
-  [delegate_ showSavePasswordInfoBar:std::move(form_to_save)];
+
+  if (update_password && IsUpdatePasswordUIEnabled()) {
+    [delegate_ showUpdatePasswordInfoBar:std::move(form_to_save)];
+  } else {
+    [delegate_ showSavePasswordInfoBar:std::move(form_to_save)];
+  }
+
   return true;
 }
 
 void IOSChromePasswordManagerClient::AutomaticPasswordSave(
     std::unique_ptr<PasswordFormManager> saved_form_manager) {
   NOTIMPLEMENTED();
 }
 
 bool IOSChromePasswordManagerClient::IsOffTheRecord() const {
   return (delegate_.browserState)->IsOffTheRecord();
@@ skipping 25 matching lines @@
   NOTIMPLEMENTED();
 }
 
 bool IOSChromePasswordManagerClient::IsSavingAndFillingEnabledForCurrentPage()
     const {
   return *saving_passwords_enabled_ && !IsOffTheRecord() &&
          !DidLastPageLoadEncounterSSLErrors() &&
          IsFillingEnabledForCurrentPage();
 }
 
+bool IOSChromePasswordManagerClient::IsUpdatePasswordUIEnabled() const {
+  return experimental_flags::IsUpdatePasswordUIEnabled();
+}
+
 const GURL& IOSChromePasswordManagerClient::GetLastCommittedEntryURL() const {
   return delegate_.lastCommittedURL;
 }
 
 const password_manager::CredentialsFilter*
 IOSChromePasswordManagerClient::GetStoreResultFilter() const {
   return &credentials_filter_;
 }