Moves ImmersiveFullscreenController::SetupForTest into test class

ash/wm/immersive_fullscreen_controller.h

 // Copyright 2013 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_WM_IMMERSIVE_FULLSCREEN_CONTROLLER_H_
 #define ASH_WM_IMMERSIVE_FULLSCREEN_CONTROLLER_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 55 matching lines @@
   // destroyed, if immersive fullscreen is enabled and there is nothing else
   // keeping the top-of-window views revealed, the top-of-window views will be
   // closed. This method always returns a valid lock regardless of whether
   // immersive fullscreen is enabled. The lock's lifetime can span immersive
   // fullscreen being enabled / disabled. If acquiring the lock causes a reveal,
   // the top-of-window views will animate according to |animate_reveal|. The
   // caller takes ownership of the returned lock.
   ImmersiveRevealedLock* GetRevealedLock(AnimateReveal animate_reveal)
       WARN_UNUSED_RESULT;
 
-  // Disables animations and moves the mouse so that it is not over the
-  // top-of-window views for the sake of testing.
-  void SetupForTest();
-
   views::Widget* widget() { return widget_; }
   views::View* top_container() { return top_container_; }
 
   // TODO(sky): move OnMouseEvent/OnTouchEvent to private section.
   void OnMouseEvent(const ui::MouseEvent& event,
                     const gfx::Point& location_in_screen,
                     views::Widget* target);
   void OnTouchEvent(const ui::TouchEvent& event,
                     const gfx::Point& location_in_screen);
   // Processes a GestureEvent. This may call SetHandled() on the supplied event.
@@ skipping 149 matching lines @@
   std::unique_ptr<ImmersiveGestureHandler> immersive_gesture_handler_;
 
   base::WeakPtrFactory<ImmersiveFullscreenController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ImmersiveFullscreenController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_IMMERSIVE_FULLSCREEN_CONTROLLER_H_