mash: Use ChromeLauncherControllerImpl, remove Mus subclass stub.

chrome/browser/ui/ash/launcher/extension_launcher_context_menu.cc

 // 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.
 
 #include "chrome/browser/ui/ash/launcher/extension_launcher_context_menu.h"
 
-#include "ash/shell.h"
 #include "base/bind.h"
 #include "chrome/browser/extensions/context_menu_matcher.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/extensions/launch_util.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller_util.h"
 #include "chrome/browser/ui/browser_commands.h"
@@ skipping 58 matching lines @@
         AddCheckItemWithStringId(LAUNCH_TYPE_FULLSCREEN,
                                  IDS_APP_CONTEXT_MENU_OPEN_MAXIMIZED);
       }
     }
   } else if (item().type == ash::TYPE_BROWSER_SHORTCUT) {
     AddItemWithStringId(MENU_NEW_WINDOW, IDS_APP_LIST_NEW_WINDOW);
     if (!controller()->profile()->IsGuestSession()) {
       AddItemWithStringId(MENU_NEW_INCOGNITO_WINDOW,
                           IDS_APP_LIST_NEW_INCOGNITO_WINDOW);
     }
-    if (!BrowserShortcutLauncherItemController(ash::Shell::Get()->shelf_model())
+    if (!BrowserShortcutLauncherItemController(controller()->shelf_model())
              .IsListOfActiveBrowserEmpty()) {
       AddItem(MENU_CLOSE,
               l10n_util::GetStringUTF16(IDS_LAUNCHER_CONTEXT_MENU_CLOSE));
     }
   } else if (item().type == ash::TYPE_DIALOG) {
     AddItemWithStringId(MENU_CLOSE, IDS_LAUNCHER_CONTEXT_MENU_CLOSE);
   } else if (controller()->IsOpen(item().id)) {
     AddItemWithStringId(MENU_CLOSE, IDS_LAUNCHER_CONTEXT_MENU_CLOSE);
   }
   AddSeparator(ui::NORMAL_SEPARATOR);
@@ skipping 123 matching lines @@
     return extensions::LAUNCH_TYPE_DEFAULT;
 
   return extensions::GetLaunchType(
       extensions::ExtensionPrefs::Get(controller()->profile()), extension);
 }
 
 void ExtensionLauncherContextMenu::SetLaunchType(extensions::LaunchType type) {
   extensions::SetLaunchType(controller()->profile(),
                             item().app_launch_id.app_id(), type);
 }