mash: Cleanup ash shelf application menu code.

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

Index: chrome/browser/ui/ash/launcher/launcher_item_controller.h
diff --git a/chrome/browser/ui/ash/launcher/launcher_item_controller.h b/chrome/browser/ui/ash/launcher/launcher_item_controller.h
index 35e62fbd02850e14db1fa4da0cbe72a61d735735..3661e81c400177175416a36ad13adea03272ee65 100644
--- a/chrome/browser/ui/ash/launcher/launcher_item_controller.h
+++ b/chrome/browser/ui/ash/launcher/launcher_item_controller.h
@@ -16,10 +16,6 @@
 
 class AppWindowLauncherItemController;
 class ChromeLauncherController;
-class ChromeLauncherAppMenuItem;
-
-using ChromeLauncherAppMenuItems =
-    std::vector<std::unique_ptr<ChromeLauncherAppMenuItem>>;
 
 // LauncherItemController is used by ChromeLauncherController to track one
 // or more windows associated with a shelf item.
@@ -59,9 +55,6 @@ class LauncherItemController : public ash::ShelfItemDelegate {
   // Returns the action performed by activating the item.
   virtual PerformedAction Activate(ash::LaunchSource source) = 0;
 
-  // Called to retrieve the list of running applications.
-  virtual ChromeLauncherAppMenuItems GetApplicationList(int event_flags) = 0;
-
   // Returns nullptr if class is not AppWindowLauncherItemController.
   virtual AppWindowLauncherItemController* AsAppWindowLauncherItemController();