mash: Replace ShelfItemDelegate::CanPin with ShelfItem::pinned_by_policy.

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

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 97 matching lines @@
 
   // 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;
 
-  // Returns true if the specified item can be pinned or unpinned. Only apps can
-  // be pinned.
-  virtual bool IsPinnable(ash::ShelfID id) const = 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.
   virtual void LockV1AppWithID(const std::string& app_id) = 0;
 
   // A previously locked shelf item of type |app_id| gets unlocked. If the
   // lock count reaches 0 and the item is not pinned it will go away.
   virtual void UnlockV1AppWithID(const std::string& app_id) = 0;
 
   // Requests that the shelf item controller specified by |id| open a new
@@ skipping 184 matching lines @@
   // An observer that manages the shelf title and icon for settings windows.
   SettingsWindowObserver settings_window_observer_;
 
   // Used to load the images for app items.
   std::vector<std::unique_ptr<AppIconLoader>> app_icon_loaders_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeLauncherController);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_