Remove Hangul IME with migration.

chrome/browser/chromeos/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 "chrome/browser/chromeos/preferences.h"
 
 #include "ash/magnifier/magnifier_constants.h"
 #include "ash/shell_delegate.h"
 #include "base/chromeos/chromeos_version.h"
 #include "base/command_line.h"
@@ skipping 717 matching lines @@
     std::vector<std::string> split_values;
     if (!value.empty())
       base::SplitString(value, ',', &split_values);
 
     input_method_manager_->SetEnabledExtensionImes(&split_values);
   }
 
   // Do not check |*pref_name| of the prefs for remembering current/previous
   // input methods here. We're only interested in initial values of the prefs.
 
+  // TODO(nona): remove all IME preference entries. crbug.com/256102
   for (size_t i = 0; i < language_prefs::kNumChewingBooleanPrefs; ++i) {
     if (!pref_name ||
         *pref_name == language_prefs::kChewingBooleanPrefs[i].pref_name) {
       SetLanguageConfigBoolean(
           language_prefs::kChewingSectionName,
           language_prefs::kChewingBooleanPrefs[i].ibus_config_name,
           chewing_boolean_prefs_[i].GetValue());
     }
   }
   for (size_t i = 0; i < language_prefs::kNumChewingMultipleChoicePrefs; ++i) {
@@ skipping 17 matching lines @@
     if (!pref_name ||
         *pref_name == language_prefs::kChewingIntegerPrefs[i].pref_name) {
       SetLanguageConfigInteger(
           language_prefs::kChewingSectionName,
           language_prefs::kChewingIntegerPrefs[i].ibus_config_name,
           chewing_integer_prefs_[i].GetValue());
     }
   }
   if (!pref_name ||
       *pref_name == prefs::kLanguageHangulKeyboard) {
-    SetLanguageConfigString(language_prefs::kHangulSectionName,
-                            language_prefs::kHangulKeyboardConfigName,
-                            hangul_keyboard_.GetValue());
+    std::vector<std::string> new_input_method_ids;
+    if (input_method_manager_->MigrateKoreanKeyboard(
+            hangul_keyboard_.GetValue(),
+            &new_input_method_ids)) {
+      preload_engines_.SetValue(JoinString(new_input_method_ids, ','));
+      hangul_keyboard_.SetValue("dummy_value_already_migrated");
+    }
   }
   if (!pref_name || *pref_name == prefs::kLanguageHangulHanjaBindingKeys) {
     SetLanguageConfigString(language_prefs::kHangulSectionName,
                             language_prefs::kHangulHanjaBindingKeysConfigName,
                             hangul_hanja_binding_keys_.GetValue());
   }
   for (size_t i = 0; i < language_prefs::kNumPinyinBooleanPrefs; ++i) {
     if (!pref_name ||
         *pref_name == language_prefs::kPinyinBooleanPrefs[i].pref_name) {
       SetLanguageConfigBoolean(
@@ skipping 225 matching lines @@
 
   input_method::AutoRepeatRate rate;
   rate.initial_delay_in_ms = xkb_auto_repeat_delay_pref_.GetValue();
   rate.repeat_interval_in_ms = xkb_auto_repeat_interval_pref_.GetValue();
   DCHECK(rate.initial_delay_in_ms > 0);
   DCHECK(rate.repeat_interval_in_ms > 0);
   input_method::XKeyboard::SetAutoRepeatRate(rate);
 }
 
 }  // namespace chromeos