Rename StackingClient -> WindowTreeClient

ui/aura/test/test_stacking_client.h

-// 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.
-
-#ifndef UI_AURA_TEST_TEST_STACKING_CLIENT_H_
-#define UI_AURA_TEST_TEST_STACKING_CLIENT_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "ui/aura/aura_export.h"
-#include "ui/aura/client/stacking_client.h"
-
-namespace aura {
-class RootWindow;
-namespace test {
-
-class TestStackingClient : public client::StackingClient {
- public:
-  explicit TestStackingClient(RootWindow* root_window);
-  virtual ~TestStackingClient();
-
-  // Overridden from client::StackingClient:
-  virtual Window* GetDefaultParent(Window* context,
-                                   Window* window,
-                                   const gfx::Rect& bounds) OVERRIDE;
-
- private:
-  RootWindow* root_window_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestStackingClient);
-};
-
-}  // namespace test
-}  // namespace aura
-
-#endif  // UI_AURA_TEST_TEST_STACKING_CLIENT_H_