Remove ibus-hangul support.

chrome/browser/chromeos/language_preferences.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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LANGUAGE_PREFERENCES_H_
 #define CHROME_BROWSER_CHROMEOS_LANGUAGE_PREFERENCES_H_
 #pragma once
 
 #include <stddef.h>  // For size_t
 
@@ skipping 76 matching lines @@
 // See comments at kNumChewingBooleanPrefs for why we hard-code this here.
 const size_t kNumChewingMultipleChoicePrefs = 2;
 
 extern const LanguageMultipleChoicePreference<int> kChewingHsuSelKeyType;
 
 // ---------------------------------------------------------------------------
 // For Korean input method (ibus-mozc-hangul)
 // ---------------------------------------------------------------------------
 extern const char kHangulSectionName[];
 extern const char kHangulKeyboardConfigName[];
-extern const char kHangulHanjaKeysConfigName[];
-extern const char kHangulHanjaKeys[];
-
-// Following configuration is for mozc-hangul and same meaning of
-// kHangulHanjaKeys.
 extern const char kHangulHanjaBindingKeysConfigName[];
 extern const char kHangulHanjaBindingKeys[];
 
 struct HangulKeyboardNameIDPair {
   int message_id;
   const char* keyboard_id;
 };
 
 extern const HangulKeyboardNameIDPair kHangulKeyboardNameIDPairs[];
 // See comments at kNumChewingBooleanPrefs for why we hard-code this here.
@@ skipping 48 matching lines @@
 extern const int kXkbAutoRepeatIntervalInMs;
 
 // A string Chrome preference (Local State) of the preferred keyboard layout in
 // the login screen.
 extern const char kPreferredKeyboardLayout[];
 
 }  // language_prefs
 }  // chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LANGUAGE_PREFERENCES_H_