Use a single ToplevelWindowEventHandler for the ash::Shell

ash/wm/workspace/workspace_event_handler_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/workspace/workspace_event_handler.h"
 
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_util.h"
 #include "ash/wm/workspace_controller.h"
 #include "ash/wm/workspace_controller_test_helper.h"
 #include "ui/aura/client/aura_constants.h"
+#include "ui/aura/client/window_move_client.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/test/event_generator.h"
 #include "ui/aura/test/test_window_delegate.h"
 #include "ui/aura/window.h"
 #include "ui/base/hit_test.h"
 #include "ui/gfx/screen.h"
 
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #endif
@@ skipping 306 matching lines @@
   generator.MoveMouseTo(generator.current_location() + gfx::Vector2d(50, 50));
 }
 
 // Verifies deleting the window while in a run loop doesn't crash.
 TEST_F(WorkspaceEventHandlerTest, DeleteWhileInRunLoop) {
   aura::test::TestWindowDelegate wd;
   const gfx::Rect bounds(10, 20, 30, 40);
   scoped_ptr<aura::Window> window(CreateTestWindow(&wd, bounds));
   wd.set_window_component(HTCAPTION);
 
-  ASSERT_TRUE(aura::client::GetWindowMoveClient(window->parent()));
+  ASSERT_TRUE(aura::client::GetWindowMoveClient(window->GetRootWindow()));
   base::MessageLoop::current()->DeleteSoon(FROM_HERE, window.get());
-  aura::client::GetWindowMoveClient(window->parent())
+  aura::client::GetWindowMoveClient(window->GetRootWindow())
       ->RunMoveLoop(window.release(),
                     gfx::Vector2d(),
                     aura::client::WINDOW_MOVE_SOURCE_MOUSE);
 }
 
 }  // namespace internal
 }  // namespace ash