Use mojo app list interfaces for mash and classic ash.

ash/common/shell_delegate.h

 // Copyright (c) 2012 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_SHELL_DELEGATE_H_
 #define ASH_COMMON_SHELL_DELEGATE_H_
 
 #include <memory>
 #include <string>
 
 #include "ash/ash_export.h"
 #include "base/callback.h"
 #include "base/strings/string16.h"
 
 class GURL;
 
-namespace app_list {
-class AppListPresenter;
-}
-
 namespace gfx {
 class Image;
 }
 
 namespace keyboard {
 class KeyboardUI;
 }
 
 namespace service_manager {
 class Connector;
@@ skipping 55 matching lines @@
 
   // Invoked when the user uses Ctrl-Shift-Q to close chrome.
   virtual void Exit() = 0;
 
   // Create a shell-specific keyboard::KeyboardUI
   virtual keyboard::KeyboardUI* CreateKeyboardUI() = 0;
 
   // Opens the |url| in a new browser tab.
   virtual void OpenUrlFromArc(const GURL& url) = 0;
 
-  // Get the AppListPresenter. Ownership stays with Chrome.
-  virtual app_list::AppListPresenter* GetAppListPresenter() = 0;
-
-  // Creates a new ShelfDelegate. Shell takes ownership of the returned
-  // value.
+  // Creates a new ShelfDelegate. Shell takes ownership of the returned value.
   virtual ShelfDelegate* CreateShelfDelegate(ShelfModel* model) = 0;
 
   // Creates a system-tray delegate. Shell takes ownership of the delegate.
   virtual SystemTrayDelegate* CreateSystemTrayDelegate() = 0;
 
   // Creates a wallpaper delegate. Shell takes ownership of the delegate.
   virtual std::unique_ptr<WallpaperDelegate> CreateWallpaperDelegate() = 0;
 
   // Creates a session state delegate. Shell takes ownership of the delegate.
   virtual SessionStateDelegate* CreateSessionStateDelegate() = 0;
@@ skipping 31 matching lines @@
   // if both local state and user prefs are enabled, otherwise disabled.
   virtual void UpdateTouchscreenStatusFromPrefs() = 0;
 
   // Toggles the status of touchpad between enabled and disabled.
   virtual void ToggleTouchpad() {}
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SHELL_DELEGATE_H_