Move Aura to UI subdir.

aura/root_window.h

-// Copyright (c) 2011 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 AURA_ROOT_WINDOW_H_
-#define AURA_ROOT_WINDOW_H_
-#pragma once
-
-#include "aura/window.h"
-
-namespace aura {
-namespace internal {
-
-class FocusManager;
-
-// A Window subclass that handles event targeting for certain types of
-// MouseEvent.
-class RootWindow : public Window {
- public:
-  RootWindow();
-  virtual ~RootWindow();
-
-  // Handles a mouse event. Returns true if handled.
-  bool HandleMouseEvent(const MouseEvent& event);
-
-  // Handles a key event. Returns true if handled.
-  bool HandleKeyEvent(const KeyEvent& event);
-
-  // Overridden from Window:
-  virtual bool IsTopLevelWindowContainer() const OVERRIDE;
-  virtual FocusManager* GetFocusManager() OVERRIDE;
-
- private:
-  Window* mouse_pressed_handler_;
-  scoped_ptr<FocusManager> focus_manager_;
-
-  DISALLOW_COPY_AND_ASSIGN(RootWindow);
-};
-
-}  // namespace internal
-}  // namespace aura
-
-#endif  // AURA_ROOT_WINDOW_H_