Moves ImmersiveFullscreenController::SetupForTest into test class

ash/wm/immersive_fullscreen_controller_unittest.cc

 // 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.
 
 #include "ash/wm/immersive_fullscreen_controller.h"
 
 #include "ash/common/shelf/shelf_types.h"
 #include "ash/common/wm/immersive/wm_immersive_fullscreen_controller_delegate.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/display/display_manager.h"
 #include "ash/display/mouse_cursor_event_filter.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/display_manager_test_api.h"
+#include "ash/test/immersive_fullscreen_controller_test_api.h"
 #include "ash/wm/window_state_aura.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/cursor_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/test/test_window_delegate.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/display/manager/display_layout.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/test/event_generator.h"
@@ skipping 131 matching lines @@
 
     top_container_ = new views::View();
     top_container_->SetBounds(0, 0, window_size.width(), 100);
     top_container_->SetFocusBehavior(views::View::FocusBehavior::ALWAYS);
     widget_->GetContentsView()->AddChildView(top_container_);
 
     delegate_.reset(
         new MockImmersiveFullscreenControllerDelegate(top_container_));
     controller_.reset(new ImmersiveFullscreenController);
     controller_->Init(delegate_.get(), widget_, top_container_);
-    controller_->SetupForTest();
+    ImmersiveFullscreenControllerTestApi(controller_.get()).SetupForTest();
 
     // The mouse is moved so that it is not over |top_container_| by
     // AshTestBase.
   }
 
   // Enables / disables immersive fullscreen.
   void SetEnabled(bool enabled) {
     controller_->SetEnabled(ImmersiveFullscreenController::WINDOW_TYPE_OTHER,
                             enabled);
   }
@@ skipping 868 matching lines @@
   SetEnabled(true);
   EXPECT_EQ(SHELF_AUTO_HIDE, shelf->GetVisibilityState());
 
   // Disabling immersive fullscreen maintains the user's auto-hide selection.
   SetEnabled(false);
   window()->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_NORMAL);
   EXPECT_EQ(SHELF_AUTO_HIDE, shelf->GetVisibilityState());
 }
 
 }  // namespase ash