Use mojo app list interfaces for mash and classic ash.

ui/app_list/presenter/app_list_presenter_delegate.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 UI_APP_LIST_PRESENTER_APP_LIST_PRESENTER_DELEGATE_H_
 #define UI_APP_LIST_PRESENTER_APP_LIST_PRESENTER_DELEGATE_H_
 
 #include <stdint.h>
 
 #include "ui/app_list/presenter/app_list_presenter_export.h"
 
 namespace aura {
 class Window;
 }
 
 namespace gfx {
 class Vector2d;
 }
 
 namespace app_list {
 
 class AppListView;
 class AppListViewDelegate;
 
-// Delegate of AppListPresenter which allows to customize AppListPresenter's
-// behavior.
+// Delegate of the app list presenter which allows customizing its behavior.
 // The design of this interface was heavily influenced by the needs of Ash's
 // app list implementation (see ash::AppListPresenterDelegate).
 class APP_LIST_PRESENTER_EXPORT AppListPresenterDelegate {
  public:
   virtual ~AppListPresenterDelegate() {}
 
   // Returns the delegate for the app list view, possibly creating one.
   virtual AppListViewDelegate* GetViewDelegate() = 0;
 
   // Called to initialize the layout of the app list.
@@ skipping 18 matching lines @@
  protected:
   // Offset in pixels to animation away/towards the shelf.
   const int kAnimationOffset = 8;
 
   int GetMinimumBoundsHeightForAppList(const app_list::AppListView* app_list);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_PRESENTER_APP_LIST_PRESENTER_DELEGATE_H_