Use mojo Shelf interfaces for both mash and classic ash.

ash/common/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_COMMON_SHELF_SHELF_DELEGATE_H_
 #define ASH_COMMON_SHELF_SHELF_DELEGATE_H_
 
 #include <string>
 
 #include "ash/ash_export.h"
 #include "ash/common/shelf/shelf_item_types.h"
 
 namespace ash {
 
 class WmShelf;
 
 // Delegate shared by all shelf instances.
 class ASH_EXPORT ShelfDelegate {
  public:
   virtual ~ShelfDelegate() {}
 
-  // Callback used to allow delegate to perform initialization actions that
-  // depend on the Shelf being in a known state.
-  virtual void OnShelfCreated(WmShelf* shelf) = 0;
-
-  // Callback used to inform the delegate that a specific shelf no longer
-  // exists.
-  virtual void OnShelfDestroyed(WmShelf* shelf) = 0;
-
-  // Called when |shelf|'s alignment changes.
-  virtual void OnShelfAlignmentChanged(WmShelf* shelf) = 0;
-
-  // Called when |shelf|'s auto-hide behavior changes.
-  virtual void OnShelfAutoHideBehaviorChanged(WmShelf* shelf) = 0;
-
-  // Called when |shelf|'s auto-hide state changes.
-  virtual void OnShelfAutoHideStateChanged(WmShelf* shelf) = 0;
-
-  // Called when |shelf|'s visibility state is committed.
-  virtual void OnShelfVisibilityStateChanged(WmShelf* shelf) = 0;
-
   // Get the shelf ID from an application ID.
   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.
   virtual ShelfID GetShelfIDForAppIDAndLaunchID(
@@ skipping 16 matching lines @@
   // 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_COMMON_SHELF_SHELF_DELEGATE_H_