mash: Remove ShelfDelegate; move functions to ShelfModel.

ash/shelf/shelf_delegate.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 ASH_SHELF_SHELF_DELEGATE_H_
-#define ASH_SHELF_SHELF_DELEGATE_H_
-
-#include <string>
-
-#include "ash/ash_export.h"
-#include "ash/public/cpp/shelf_types.h"
-
-namespace ash {
-
-// Delegate shared by all shelf instances.
-class ASH_EXPORT ShelfDelegate {
- public:
-  virtual ~ShelfDelegate() {}
-
-  // Get the shelf ID from an application ID. Returns kInvalidShelfID if the
-  // app id is unknown, or has no associated ShelfID.
-  virtual ShelfID GetShelfIDForAppID(const std::string& app_id) = 0;
-
-  // Get the shelf ID from an application ID and a launch ID.
-  // The launch ID can be passed to an app when launched in order to support
-  // multiple shelf items per app. This id is used together with the app_id to
-  // uniquely identify each shelf item that has the same app_id.
-  // For example, a single virtualization app might want to show different
-  // shelf icons for different remote apps. Returns kInvalidShelfID if the app
-  // id is unknown or has no associated ShelfID.
-  virtual ShelfID GetShelfIDForAppIDAndLaunchID(
-      const std::string& app_id,
-      const std::string& launch_id) = 0;
-
-  // Get the application ID for a given shelf ID. Returns an empty string for
-  // an unknown or invalid ShelfID.
-  virtual const std::string& GetAppIDForShelfID(ShelfID id) = 0;
-
-  // Pins an app with |app_id| to shelf. A running instance will get pinned.
-  // In case there is no running instance a new shelf item is created and
-  // pinned.
-  virtual void PinAppWithID(const std::string& app_id) = 0;
-
-  // Check if the app with |app_id_| is pinned to the shelf.
-  virtual bool IsAppPinned(const std::string& app_id) = 0;
-
-  // Unpins app item with |app_id|.
-  virtual void UnpinAppWithID(const std::string& app_id) = 0;
-};
-
-}  // namespace ash
-
-#endif  // ASH_SHELF_SHELF_DELEGATE_H_