Remove unused variables.

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 "base/basictypes.h"
 #include "chrome/browser/chromeos/language_preferences.h"
 #include "chrome/common/pref_names.h"
 #include "grit/generated_resources.h"
 
 namespace chromeos {
 namespace language_prefs {
 
 // ---------------------------------------------------------------------------
 // For ibus-daemon
 // ---------------------------------------------------------------------------
 const char kGeneralSectionName[] = "general";
-const char kHotKeySectionName[] = "general/hotkey";
 const char kPreloadEnginesConfigName[] = "preload_engines";
 
 // ---------------------------------------------------------------------------
 // For Traditional Chinese input method (ibus-mozc-chewing)
 // ---------------------------------------------------------------------------
 const char kChewingSectionName[] = "engine/Chewing";
 
 // We have to sync the |ibus_config_name|s with those in
 // ibus-chewing/files/src/Config.cc.
 const LanguageBooleanPrefs kChewingBooleanPrefs[] = {
@@ skipping 366 matching lines @@
   // since input_method::GetHardwareInputMethodId() might return a fallback
   // layout name if local_state->RegisterStringPref(kHardwareKeyboardLayout)
   // is not called yet.
   local_state->RegisterStringPref(kPreferredKeyboardLayout,
                                   "",
                                   PrefService::UNSYNCABLE_PREF);
 }
 
 }  // namespace language_prefs
 }  // namespace chromeos