Revert of AppListController refactoring part 3: Switching over to use AppListShower in Ash.

ash/test/shell_test_api.h

Index: ash/test/shell_test_api.h
diff --git a/ash/test/shell_test_api.h b/ash/test/shell_test_api.h
index 54c8684b6688f88e56253097612fd4330c0f941a..b144f0b0a0883737f18c0e86ec900b8bd85b7e6f 100644
--- a/ash/test/shell_test_api.h
+++ b/ash/test/shell_test_api.h
@@ -7,11 +7,8 @@
 
 #include "base/macros.h"
 
-namespace app_list {
-class AppListShower;
-}
-
 namespace ash {
+class AppListController;
 class AshNativeCursorManager;
 class DragDropController;
 class MaximizeModeWindowManager;
@@ -38,7 +35,7 @@
   AshNativeCursorManager* ash_native_cursor_manager();
   ShelfModel* shelf_model();
   DragDropController* drag_drop_controller();
-  app_list::AppListShower* app_list_shower();
+  AppListController* app_list_controller();
   MaximizeModeWindowManager* maximize_mode_window_manager();
   void DisableDisplayAnimator();