mash: Refactor ChromeLauncherController's ShelfDelegate code.

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

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller.h
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.h b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.h
index a2168261133a51ed213740946ecce16b537648e2..3741cfdf7d5dc0d576de6df9a910aecfa9f6477c 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.h
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.h
@@ -96,18 +96,9 @@ class ChromeLauncherController : public ash::mojom::ShelfObserver,
   // Closes or unpins the shelf item.
   virtual void CloseLauncherItem(ash::ShelfID id) = 0;
 
-  // Pins the specified id. Currently only supports platform apps.
-  virtual void Pin(ash::ShelfID id) = 0;
-
-  // Unpins the specified id, closing if not running.
-  virtual void Unpin(ash::ShelfID id) = 0;
-
   // Returns true if the item identified by |id| is pinned.
   virtual bool IsPinned(ash::ShelfID id) = 0;
 
-  // Pins/unpins the specified id.
-  virtual void TogglePinned(ash::ShelfID id) = 0;
-
   // If there is no item in the shelf for application |app_id|, one is created.
   // The (existing or created) shelf items get then locked against a user's
   // un-pinning removal. Used for V1 apps opened as windows that aren't pinned.