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

chrome/browser/cocoa/wrench_menu_controller.mm

Index: chrome/browser/cocoa/wrench_menu_controller.mm
diff --git a/chrome/browser/cocoa/wrench_menu_controller.mm b/chrome/browser/cocoa/wrench_menu_controller.mm
index 11d40a2b6e3eb43576352bc24715d8db1ff94042..49661570aa3749a517e05328756cc34702a45ba3 100644
--- a/chrome/browser/cocoa/wrench_menu_controller.mm
+++ b/chrome/browser/cocoa/wrench_menu_controller.mm
@@ -63,11 +63,6 @@ class ZoomLevelObserver : public NotificationObserver {
   return self;
 }
 
-- (void)setWrenchMenuModel:(WrenchMenuModel*)model {
-  wrench_model_ = model;
-  [self setModel:model->menu_model()];
-}
-
 - (void)addItemToMenu:(NSMenu*)menu
               atIndex:(NSInteger)index
             fromModel:(menus::MenuModel*)model
@@ -171,7 +166,37 @@ class ZoomLevelObserver : public NotificationObserver {
 }
 
 - (WrenchMenuModel*)wrenchMenuModel {
-  return wrench_model_;
+  return static_cast<WrenchMenuModel*>(model_);
+}
+
+// Inserts the update available notification menu item.
+- (void)insertUpdateAvailableItem {
+  WrenchMenuModel* model = [self wrenchMenuModel];
+  // Don't insert the item multiple times.
+  if (!model || model->GetIndexOfCommandId(IDC_ABOUT) != -1)
+    return;
+
+  // Update the model manually because the model is static because other
+  // platforms always have an About item.
+  int index = model->GetIndexOfCommandId(IDC_OPTIONS) + 1;
+  model->InsertItemAt(index, IDC_ABOUT,
+                      l10n_util::GetStringFUTF16(IDS_ABOUT,
+                          l10n_util::GetStringUTF16(IDS_PRODUCT_NAME)));
+
+  // The model does not broadcast change notifications to its delegate, so
+  // insert the actual menu item ourselves.
+  NSInteger menuIndex = [[self menu] indexOfItemWithTag:index];
+  [self addItemToMenu:[self menu]
+              atIndex:menuIndex
+            fromModel:model
+           modelIndex:index];
+
+  // Since the tag of each menu item is the index within the model, they need
+  // to be adjusted after insertion.
+  for (NSInteger i = menuIndex + 1; i < [[self menu] numberOfItems]; ++i) {
+    NSMenuItem* item = [[self menu] itemAtIndex:i];
+    [item setTag:[item tag] + 1];
+  }
 }
 
 // Fit the localized strings into the Cut/Copy/Paste control, then resize the