Implement the "Configure modifier keys" drop-down

chrome/common/pref_names.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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 
 #include "build/build_config.h"
@@ skipping 109 matching lines @@
 extern const wchar_t kLanguageMozcNumpadCharacterForm[];
 extern const wchar_t kLanguageMozcIncognitoMode[];
 extern const wchar_t kLanguageMozcUseAutoImeTurnOff[];
 extern const wchar_t kLanguageMozcUseDateConversion[];
 extern const wchar_t kLanguageMozcUseSingleKanjiConversion[];
 extern const wchar_t kLanguageMozcUseSymbolConversion[];
 extern const wchar_t kLanguageMozcUseNumberConversion[];
 extern const wchar_t kLanguageMozcUseHistorySuggest[];
 extern const wchar_t kLanguageMozcUseDictionarySuggest[];
 extern const wchar_t kLanguageMozcSuggestionsSize[];
+extern const wchar_t kLanguageXkbModifierRemap[];
 extern const wchar_t kAccessibilityEnabled[];
 extern const wchar_t kLabsAdvancedFilesystemEnabled[];
 extern const wchar_t kLabsMediaplayerEnabled[];
 #endif
 extern const wchar_t kIpcDisabledMessages[];
 extern const wchar_t kShowHomeButton[];
 extern const wchar_t kShowPageOptionsButtons[];
 extern const wchar_t kRecentlySelectedEncoding[];
 extern const wchar_t kDeleteBrowsingHistory[];
 extern const wchar_t kDeleteDownloadHistory[];
@@ skipping 204 matching lines @@
 extern const wchar_t kProxyAutoDetect[];
 extern const wchar_t kProxyServer[];
 extern const wchar_t kProxyPacUrl[];
 extern const wchar_t kProxyBypassList[];
 
 extern const wchar_t kRegisteredBackgroundContents[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_