Remove LauncherItemController::Launch, cleanup.

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 3661e81c400177175416a36ad13adea03272ee65..7bf6c246590c6b2a735d47c076cf43b2f7d44168 100644
--- a/chrome/browser/ui/ash/launcher/launcher_item_controller.h
+++ b/chrome/browser/ui/ash/launcher/launcher_item_controller.h
@@ -47,9 +47,6 @@ class LauncherItemController : public ash::ShelfItemDelegate {
     image_set_by_controller_ = image_set_by_controller;
   }
 
-  // Launches a new instance of the app associated with this item.
-  virtual void Launch(ash::LaunchSource source, int event_flags) = 0;
-
   // Shows and activates the most-recently-active window associated with the
   // item, or launches the item if it is not currently open.
   // Returns the action performed by activating the item.