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diff --git a/chrome/browser/chromeos/options/language_config_util.h b/chrome/browser/chromeos/options/language_config_util.h
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+++ b/chrome/browser/chromeos/options/language_config_util.h
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+// 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_OPTIONS_LANGUAGE_CONFIG_UTIL_H_
+#define CHROME_BROWSER_CHROMEOS_OPTIONS_LANGUAGE_CONFIG_UTIL_H_
+
+#include "chrome/browser/chromeos/language_preferences.h"
+#include "views/controls/combobox/combobox.h"
+
+namespace chromeos {
+
+// The combobox model for Language input method prefs.
+class LanguageComboboxModel : public ComboboxModel {
+ public:
+  explicit LanguageComboboxModel(
+      const LanguageMultipleChoicePreference* pref_data)
+          : pref_data_(pref_data), num_items_(0) {
+    // Check how many items are defined in the |pref_data->values_and_ids|
+    // array.
+    for (size_t i = 0; i < LanguageMultipleChoicePreference::kMaxItems; ++i) {
+      if ((pref_data_->values_and_ids)[i].ibus_config_value == NULL) {
+        break;
+      }
+      ++num_items_;
+    }
+  }
+
+  // Implements ComboboxModel interface.
+  virtual int GetItemCount() {
+    return num_items_;
+  }
+
+  // Implements ComboboxModel interface.
+  virtual std::wstring GetItemAt(int index) {
+    if (index < 0 || index >= num_items_) {
+      LOG(ERROR) << "Index is out of bounds: " << index;
+      return L"";
+    }
+    const int message_id = (pref_data_->values_and_ids)[index].item_message_id;
+    return l10n_util::GetString(message_id);
+  }
+
+  // Gets a label for the combobox like "Input mode". This function is NOT part
+  // of the ComboboxModel interface.
+  std::wstring GetLabel() const {
+    return l10n_util::GetString(pref_data_->label_message_id);
+  }
+
+  // Gets a config value for the ibus configuration daemon (e.g. "KUTEN_TOUTEN",
+  // "KUTEN_PERIOD", ..) for an item at zero-origin |index|. This function is
+  // NOT part of the ComboboxModel interface.
+  std::wstring GetConfigValueAt(int index) const {
+    if (index < 0 || index >= num_items_) {
+      LOG(ERROR) << "Index is out of bounds: " << index;
+      return L"";
+    }
+    return UTF8ToWide((pref_data_->values_and_ids)[index].ibus_config_value);
+  }
+
+  // Gets an index (>= 0) of an item such that GetConfigValueAt(index) is equal
+  // to the |config_value|. Returns -1 if such item is not found. This function
+  // is NOT part of the ComboboxModel interface.
+  int GetIndexFromConfigValue(const std::wstring& config_value) const {
+    for (int i = 0; i < num_items_; ++i) {
+      if (GetConfigValueAt(i) == config_value) {
+        return i;
+      }
+    }
+    return -1;
+  }
+
+ private:
+  const LanguageMultipleChoicePreference* pref_data_;
+  int num_items_;
+
+  DISALLOW_COPY_AND_ASSIGN(LanguageComboboxModel);
+};
+
+// The combobox for the dialog which has minimum width.
+class LanguageCombobox : public views::Combobox {
+ public:
+  explicit LanguageCombobox(ComboboxModel* model) : Combobox(model) {
+  }
+
+  virtual gfx::Size GetPreferredSize() {
+    gfx::Size size = Combobox::GetPreferredSize();
+    if (size.width() < kMinComboboxWidth) {
+      size.set_width(kMinComboboxWidth);
+    }
+    return size;
+  }
+
+ private:
+  static const int kMinComboboxWidth = 100;
+
+  DISALLOW_COPY_AND_ASSIGN(LanguageCombobox);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_OPTIONS_LANGUAGE_CONFIG_UTIL_H_