ash: Update app list button.

ash/shell.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_SHELL_H_
 #define ASH_SHELL_H_
 
 #include <utility>
 #include <vector>
 
@@ skipping 426 matching lines @@
 #endif  // defined(OS_CHROMEOS)
 
   RootWindowHostFactory* root_window_host_factory() {
     return root_window_host_factory_.get();
   }
 
   LauncherModel* launcher_model() {
     return launcher_model_.get();
   }
 
+  internal::AppListController* app_list_controller() {
+    return app_list_controller_.get();
+  }
+
   // Returns the launcher delegate, creating if necesary.
   LauncherDelegate* GetLauncherDelegate();
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ExtendedDesktopTest, TestCursor);
   FRIEND_TEST_ALL_PREFIXES(WindowManagerTest, MouseEventCursors);
   FRIEND_TEST_ALL_PREFIXES(WindowManagerTest, TransformActivate);
   friend class internal::RootWindowController;
   friend class test::ShellTestApi;
   friend class shell::WindowWatcher;
@@ skipping 130 matching lines @@
 
   // For testing only: simulate that a modal window is open
   bool simulate_modal_window_open_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_