mash: Remove shelf app menu item objects.

chrome/browser/ui/ash/launcher/app_shortcut_launcher_item_controller.h

Index: chrome/browser/ui/ash/launcher/app_shortcut_launcher_item_controller.h
diff --git a/chrome/browser/ui/ash/launcher/app_shortcut_launcher_item_controller.h b/chrome/browser/ui/ash/launcher/app_shortcut_launcher_item_controller.h
index 73a1909cd76b49b055b3c0d747c6d0fce420e625..a21a5f4243302141518f0332ef0e9bd81d0496a9 100644
--- a/chrome/browser/ui/ash/launcher/app_shortcut_launcher_item_controller.h
+++ b/chrome/browser/ui/ash/launcher/app_shortcut_launcher_item_controller.h
@@ -46,6 +46,7 @@ class AppShortcutLauncherItemController : public LauncherItemController {
                                 int64_t display_id,
                                 ash::ShelfLaunchSource source) override;
   ash::ShelfAppMenuItemList GetAppMenuItems(int event_flags) override;
+  void ExecuteCommand(uint32_t command_id, int event_flags) override;
   void Close() override;
 
   // Get the refocus url pattern, which can be used to identify this application
@@ -97,6 +98,9 @@ class AppShortcutLauncherItemController : public LauncherItemController {
 
   ChromeLauncherController* chrome_launcher_controller_;
 
+  // The cached list of open app web contents shown in an application menu.
+  std::vector<content::WebContents*> app_menu_items_;
+
   DISALLOW_COPY_AND_ASSIGN(AppShortcutLauncherItemController);
 };