mash: Add autoclick app.

ash/autoclick/common/autoclick_controller_common_delegate.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_AUTOCLICK_COMMON_AUTOCLICK_CONTROLLER_COMMON_DELEGATE_H
 #define ASH_AUTOCLICK_COMMON_AUTOCLICK_CONTROLLER_COMMON_DELEGATE_H
 
 #include "base/macros.h"
 
 namespace views {
 class Widget;
 }
 
 namespace gfx {
 class Point;
 }
 
 namespace ash {
 
 class AutoclickControllerCommonDelegate {
  public:
   AutoclickControllerCommonDelegate() {}
   virtual ~AutoclickControllerCommonDelegate() {}
 
-  // Creates a ring widget at |event_location|. AutoclickControllerCommon
-  // takes ownership of the created widget.
-  virtual std::unique_ptr<views::Widget> CreateAutoclickRingWidget(
+  // Creates a ring widget at |event_location|.
+  // AutoclickControllerCommonDelegate still has ownership of the widget they
+  // created.
+  virtual views::Widget* CreateAutoclickRingWidget(
       const gfx::Point& event_location) = 0;
 
   // Moves |widget| to |event_location|.
   virtual void UpdateAutoclickRingWidget(views::Widget* widget,
                                          const gfx::Point& event_location) = 0;
 
   // Generates a click with |mouse_event_flags| at |event_location|.
   virtual void DoAutoclick(const gfx::Point& event_location,
                            const int mouse_event_flags) = 0;
 
   virtual void OnAutoclickCanceled() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AutoclickControllerCommonDelegate);
 };
 
 }  // namespace ash
 
 #endif  // ASH_AUTOCLICK_COMMON_AUTOCLICK_CONTROLLER_COMMON_DELEGATE_H