[Chrome OS] Expose keyboard auto repeat delay/interval to login screen.

chrome/browser/chromeos/language_preferences.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/chromeos/language_preferences.h"
 #include "components/prefs/pref_registry_simple.h"
 
 namespace chromeos {
 namespace language_prefs {
 
 // ---------------------------------------------------------------------------
 // For ibus-daemon
 // ---------------------------------------------------------------------------
 const char kGeneralSectionName[] = "general";
 const char kPreloadEnginesConfigName[] = "preload_engines";
 
 // ---------------------------------------------------------------------------
 // For keyboard stuff
 // ---------------------------------------------------------------------------
+const bool kXkbAutoRepeatEnabled = true;
 const int kXkbAutoRepeatDelayInMs = 500;
 const int kXkbAutoRepeatIntervalInMs = 50;
 const char kPreferredKeyboardLayout[] = "PreferredKeyboardLayout";
 
 void RegisterPrefs(PrefRegistrySimple* registry) {
   // We use an empty string here rather than a hardware keyboard layout name
   // since input_method::GetHardwareInputMethodId() might return a fallback
   // layout name if registry->RegisterStringPref(kHardwareKeyboardLayout)
   // is not called yet.
   registry->RegisterStringPref(kPreferredKeyboardLayout, "");
 }
 
 }  // namespace language_prefs
 }  // namespace chromeos