Simplify the translate infobar code some.

chrome/browser/translate/languages_menu_model.cc

-// 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.
-
-#include "chrome/browser/translate/languages_menu_model.h"
-
-#include "base/metrics/histogram.h"
-#include "chrome/browser/translate/translate_infobar_delegate.h"
-
-LanguagesMenuModel::LanguagesMenuModel(
-    TranslateInfoBarDelegate* translate_delegate,
-    LanguageType language_type)
-    : ALLOW_THIS_IN_INITIALIZER_LIST(ui::SimpleMenuModel(this)),
-      translate_infobar_delegate_(translate_delegate),
-      language_type_(language_type) {
-  for (size_t i = 0; i < translate_delegate->GetLanguageCount(); ++i) {
-    AddCheckItem(static_cast<int>(i),
-                 translate_delegate->GetLanguageDisplayableNameAt(i));
-  }
-}
-
-LanguagesMenuModel::~LanguagesMenuModel() {
-}
-
-bool LanguagesMenuModel::IsCommandIdChecked(int command_id) const {
-  return static_cast<size_t>(command_id) == ((language_type_ == ORIGINAL) ?
-      translate_infobar_delegate_->original_language_index() :
-      translate_infobar_delegate_->target_language_index());
-}
-
-bool LanguagesMenuModel::IsCommandIdEnabled(int command_id) const {
-  // Prevent the same language from being selectable in original and target.
-  return static_cast<size_t>(command_id) != ((language_type_ == ORIGINAL) ?
-      translate_infobar_delegate_->target_language_index() :
-      translate_infobar_delegate_->original_language_index());
-}
-
-bool LanguagesMenuModel::GetAcceleratorForCommandId(
-    int command_id,
-    ui::Accelerator* accelerator) {
-  return false;
-}
-
-void LanguagesMenuModel::ExecuteCommand(int command_id) {
-  size_t command_id_size_t = static_cast<size_t>(command_id);
-  if (language_type_ == ORIGINAL) {
-    UMA_HISTOGRAM_COUNTS("Translate.ModifyOriginalLang", 1);
-    translate_infobar_delegate_->SetOriginalLanguage(command_id_size_t);
-    return;
-  }
-  UMA_HISTOGRAM_COUNTS("Translate.ModifyTargetLang", 1);
-  translate_infobar_delegate_->SetTargetLanguage(command_id_size_t);
-}