AppListController refactoring part 2: Ash's AppListShowerDelegate imlementation.

ash/app_list/app_list_view_delegate_factory.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 ASH_KEYBOARD_KEYBOARD_UI_OBSERVER_H_
-#define ASH_KEYBOARD_KEYBOARD_UI_OBSERVER_H_
+#ifndef ASH_WM_APP_LIST_VIEW_DELEGATE_FACTORY_H_
+#define ASH_WM_APP_LIST_VIEW_DELEGATE_FACTORY_H_
 
 #include "ash/ash_export.h"
-#include "base/macros.h"
+
+namespace app_list {
+class AppListViewDelegate;
+}
 
 namespace ash {
 
-class ASH_EXPORT KeyboardUIObserver {
+class ASH_EXPORT AppListViewDelegateFactory {
  public:
-  virtual void OnKeyboardEnabledStateChanged(bool new_value) = 0;
+  virtual ~AppListViewDelegateFactory() {}
 
- protected:
-  virtual ~KeyboardUIObserver() {}
+  virtual app_list::AppListViewDelegate* GetDelegate() = 0;
 };
 
 }  // namespace ash
 
-#endif  // ASH_KEYBOARD_KEYBOARD_UI_OBSERVER_H_
+#endif  // ASH_WM_APP_LIST_VIEW_DELEGATE_FACTORY_H_