re-re-land of https://codereview.chromium.org/11364053/

ui/aura/desktop/desktop_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_DESKTOP_DESKTOP_STACKING_CLIENT_H_
-#define UI_AURA_DESKTOP_DESKTOP_STACKING_CLIENT_H_
-
-#include "ui/aura/client/stacking_client.h"
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
-#include "ui/views/views_export.h"
-
-namespace views {
-namespace corewm {
-class CompoundEventFilter;
-class InputMethodEventFilter;
-}
-}
-
-namespace aura {
-class DesktopActivationClient;
-class FocusManager;
-class RootWindow;
-class Window;
-
-namespace client {
-class DefaultCaptureClient;
-}
-
-// A stacking client for the desktop; always sets the default parent to the
-// RootWindow of the passed in Window.
-class VIEWS_EXPORT DesktopStackingClient : public client::StackingClient {
- public:
-  DesktopStackingClient();
-  virtual ~DesktopStackingClient();
-
-  // Overridden from client::StackingClient:
-  virtual Window* GetDefaultParent(Window* window,
-                                   const gfx::Rect& bounds) OVERRIDE;
-
- private:
-  void CreateNULLParent();
-
-  // Windows with NULL parents are parented to this.
-  scoped_ptr<RootWindow> null_parent_;
-
-  // All the member variables below are necessary for the NULL parent root
-  // window to function.
-  scoped_ptr<FocusManager> focus_manager_;
-  // Depends on focus_manager_.
-  scoped_ptr<DesktopActivationClient> activation_client_;
-
-  scoped_ptr<views::corewm::InputMethodEventFilter> input_method_filter_;
-  views::corewm::CompoundEventFilter* window_event_filter_;
-
-  scoped_ptr<client::DefaultCaptureClient> capture_client_;
-
-  DISALLOW_COPY_AND_ASSIGN(DesktopStackingClient);
-};
-
-}  // namespace aura
-
-#endif  // UI_AURA_DESKTOP_DESKTOP_STACKING_CLIENT_H_