Desktop aura: Break aura::Window::SetParent in two.

ash/wm/shelf_layout_manager_unittest.cc

 // Copyright (c) 2012 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/shelf_layout_manager.h"
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/accelerators/accelerator_table.h"
 #include "ash/ash_switches.h"
 #include "ash/display/display_manager.h"
@@ skipping 152 matching lines @@
 
   void UpdateAutoHideStateNow() {
     GetShelfLayoutManager()->UpdateAutoHideStateNow();
   }
 
   aura::Window* CreateTestWindow() {
     aura::Window* window = new aura::Window(NULL);
     window->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_NORMAL);
     window->SetType(aura::client::WINDOW_TYPE_NORMAL);
     window->Init(ui::LAYER_TEXTURED);
-    window->SetParent(NULL);
+    AddToRootWindow(window);
     return window;
   }
 
   // Overridden from AshTestBase:
   virtual void SetUp() OVERRIDE {
     CommandLine::ForCurrentProcess()->AppendSwitch(
         ash::switches::kAshEnableTrayDragging);
     test::AshTestBase::SetUp();
   }
  private:
@@ skipping 788 matching lines @@
       EXPECT_TRUE(status_area_widget->IsMessageBubbleShown());
     } else {
       EXPECT_FALSE(shelf->IsVisible());
       EXPECT_FALSE(status_area_widget->IsMessageBubbleShown());
     }
   }
 }
 
 }  // namespace internal
 }  // namespace ash