Add mash shelf application id support.

ash/mus/shelf_delegate_mus.h

 // Copyright 2016 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 ASH_MUS_SHELF_DELEGATE_MUS_H_
 #define ASH_MUS_SHELF_DELEGATE_MUS_H_
 
 #include <map>
 
 #include "ash/shelf/shelf_delegate.h"
@@ skipping 28 matching lines @@
   void PinAppWithID(const std::string& app_id) override;
   bool IsAppPinned(const std::string& app_id) override;
   void UnpinAppWithID(const std::string& app_id) override;
 
   // mash::shelf::mojom::ShelfController:
   void AddObserver(
       mash::shelf::mojom::ShelfObserverAssociatedPtrInfo observer) override;
   void SetAlignment(mash::shelf::mojom::Alignment alignment) override;
   void SetAutoHideBehavior(
       mash::shelf::mojom::AutoHideBehavior auto_hide) override;
-  void AddItem(
+  void PinItem(
       mash::shelf::mojom::ShelfItemPtr item,
       mash::shelf::mojom::ShelfItemDelegateAssociatedPtrInfo delegate) override;
-  void RemoveItem(const mojo::String& id) override;
+  void UnpinItem(const mojo::String& app_id) override;
 
   // mash::wm::mojom::UserWindowObserver:
   void OnUserWindowObserverAdded(
       mojo::Array<mash::wm::mojom::UserWindowPtr> user_windows) override;
   void OnUserWindowAdded(mash::wm::mojom::UserWindowPtr user_window) override;
   void OnUserWindowRemoved(uint32_t window_id) override;
   void OnUserWindowTitleChanged(uint32_t window_id,
                                 const mojo::String& window_title) override;
   void OnUserWindowAppIconChanged(uint32_t window_id,
                                   mojo::Array<uint8_t> app_icon) override;
@@ skipping 13 matching lines @@
 
   std::map<std::string, ShelfID> app_id_to_shelf_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfDelegateMus);
 };
 
 }  // namespace sysui
 }  // namespace ash
 
 #endif  // ASH_MUS_SHELF_DELEGATE_MUS_H_