Remove ibus-hangul support.

chrome/common/pref_names.h

 // Copyright (c) 2011 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_
 #pragma once
 
@@ skipping 107 matching lines @@
 extern const char kLanguageChewingPlainZhuyin[];
 extern const char kLanguageChewingPhraseChoiceRearward[];
 extern const char kLanguageChewingSpaceAsSelection[];
 extern const char kLanguageChewingMaxChiSymbolLen[];
 extern const char kLanguageChewingCandPerPage[];
 extern const char kLanguageChewingKeyboardType[];
 extern const char kLanguageChewingSelKeys[];
 extern const char kLanguageChewingHsuSelKeyType[];
 extern const char kLanguageHangulKeyboard[];
 extern const char kLanguageHangulHanjaBindingKeys[];
-extern const char kLanguageHangulHanjaKeys[];
 extern const char kLanguagePinyinCorrectPinyin[];
 extern const char kLanguagePinyinFuzzyPinyin[];
 extern const char kLanguagePinyinLookupTablePageSize[];
 extern const char kLanguagePinyinShiftSelectCandidate[];
 extern const char kLanguagePinyinMinusEqualPage[];
 extern const char kLanguagePinyinCommaPeriodPage[];
 extern const char kLanguagePinyinAutoCommit[];
 extern const char kLanguagePinyinDoublePinyin[];
 extern const char kLanguagePinyinDoublePinyinSchema[];
 extern const char kLanguagePinyinInitChinese[];
@@ skipping 389 matching lines @@
 extern const char kCustomHandlersEnabled[];
 
 extern const char kUserCreatedLoginItem[];
 extern const char kBackgroundModeEnabled[];
 
 extern const char kDevicePolicyRefreshRate[];
 extern const char kUserPolicyRefreshRate[];
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_