Add EnableInputMethodsAndKeyboardLayouts function

chrome/browser/chromeos/language_preferences.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LANGUAGE_PREFERENCES_H_
 #define CHROME_BROWSER_CHROMEOS_LANGUAGE_PREFERENCES_H_
 
 #include "base/basictypes.h"
 #include "chrome/common/pref_names.h"
 #include "grit/generated_resources.h"
@@ skipping 374 matching lines @@
 const LanguageIntegerRangePreference kMozcIntegerPrefs[] = {
   { prefs::kLanguageMozcSuggestionsSize, 3, 1, 9, "suggestions_size",
     IDS_MOZC(SUGGESTIONS_SIZE)},
 };
 const size_t kNumMozcIntegerPrefs = ARRAYSIZE_UNSAFE(kMozcIntegerPrefs);
 
 #undef IDS_MOZC
 
 // For Traditional Chinese input methods (ibus-pinyin-bopomofo and ibus-chewing)
 // TODO(yusukes): Add constants for Traditional Chinese input methods.
+
+// A input method name that corresponds the hardware keyboard layout.
+// TODO(yusukes): just assuming US qwerty keyboard is not always correct.
+const char kHardwareKeyboardLayout[] = "xkb:us::eng";
+
 }  // chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LANGUAGE_PREFERENCES_H_