Clean up the WrenchMenuModel so that it uses SimpleMenu::Delegate.

chrome/browser/gtk/browser_toolbar_gtk.cc

Index: chrome/browser/gtk/browser_toolbar_gtk.cc
diff --git a/chrome/browser/gtk/browser_toolbar_gtk.cc b/chrome/browser/gtk/browser_toolbar_gtk.cc
index a28abed6727a227bb7e50bb502e2d1c916b45809..2d8562af4c9b63693d5024fb94d4aff2f7e6c439 100644
--- a/chrome/browser/gtk/browser_toolbar_gtk.cc
+++ b/chrome/browser/gtk/browser_toolbar_gtk.cc
@@ -227,7 +227,7 @@ void BrowserToolbarGtk::Init(Profile* profile,
   gtk_container_add(GTK_CONTAINER(wrench_box), wrench_button);
   gtk_box_pack_start(GTK_BOX(toolbar_), wrench_box, FALSE, FALSE, 4);
 
-  wrench_menu_.reset(new MenuGtk(this, &wrench_menu_model_));
+  wrench_menu_.reset(new MenuGtk(this, wrench_menu_model_.menu_model()));
   g_signal_connect(wrench_menu_->widget(), "show",
                    G_CALLBACK(OnWrenchMenuShowThunk), this);
 
@@ -333,33 +333,7 @@ GtkIconSet* BrowserToolbarGtk::GetIconSetForId(int idr) {
   return theme_provider_->GetIconSetForId(idr);
 }
 
-// menus::SimpleMenuModel::Delegate
-
-bool BrowserToolbarGtk::IsCommandIdEnabled(int id) const {
-  return browser_->command_updater()->IsCommandEnabled(id);
-}
-
-bool BrowserToolbarGtk::IsCommandIdChecked(int id) const {
-  if (!profile_)
-    return false;
-
-  EncodingMenuController controller;
-  if (id == IDC_SHOW_BOOKMARK_BAR) {
-    return profile_->GetPrefs()->GetBoolean(prefs::kShowBookmarkBar);
-  } else if (controller.DoesCommandBelongToEncodingMenu(id)) {
-    TabContents* tab_contents = browser_->GetSelectedTabContents();
-    if (tab_contents) {
-      return controller.IsItemChecked(profile_, tab_contents->encoding(),
-                                      id);
-    }
-  }
-
-  return false;
-}
-
-void BrowserToolbarGtk::ExecuteCommand(int id) {
-  browser_->ExecuteCommand(id);
-}
+// menus::AcceleratorProvider
 
 bool BrowserToolbarGtk::GetAcceleratorForCommandId(
     int id,