Implement the "Configure modifier keys" drop-down

chrome/browser/chromeos/language_preferences.h

Index: chrome/browser/chromeos/language_preferences.h
diff --git a/chrome/browser/chromeos/language_preferences.h b/chrome/browser/chromeos/language_preferences.h
index 34ab1ec5998b51fa3e18a4b7d37a34ac44f2d800..2b60d3824e54b4e2257a2ff91aaa12a8f620f2f6 100644
--- a/chrome/browser/chromeos/language_preferences.h
+++ b/chrome/browser/chromeos/language_preferences.h
@@ -93,6 +93,25 @@ const LanguageIntegerRangePreference kChewingIntegerPrefs[] = {
 };
 const size_t kNumChewingIntegerPrefs = ARRAYSIZE_UNSAFE(kChewingIntegerPrefs);
 
+// Temporary solution for crosbug.com/2636. We'll implement a complete dialog
+// using DOMUI later.
+enum RemapType {
+  kNoRemap = 0,
+  kSwapCtrlAndAlt = 1,
+  kSwapSearchAndCtrl = 2,
+};
+const LanguageMultipleChoicePreference<int> kXkbModifierMultipleChoicePrefs = {
+  prefs::kLanguageXkbModifierRemap,
+  kNoRemap,
+  "dummy",  // does not use the ibus configuration service.
+  {{ kNoRemap, IDS_OPTIONS_SETTINGS_LANGUAGES_XKB_MODIFIER_NO_REMAP },
+   { kSwapCtrlAndAlt,
+     IDS_OPTIONS_SETTINGS_LANGUAGES_XKB_MODIFIER_REMAP_CTRL_ALT },
+   { kSwapSearchAndCtrl,
+     IDS_OPTIONS_SETTINGS_LANGUAGES_XKB_MODIFIER_REMAP_SEARCH_CTRL }},
+  0,  // does not use the label.
+};
+
 const LanguageMultipleChoicePreference<const char*>
     kChewingMultipleChoicePrefs[] = {
   { prefs::kLanguageChewingKeyboardType,