Sort out build dependencies for LinuxUI.

ui/shell_dialogs/linux_ui_shell_dialog.h

-// Copyright (c) 2013 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_SHELL_DIALOGS_LINUX_UI_SHELL_DIALOG_H_
-#define UI_SHELL_DIALOGS_LINUX_UI_SHELL_DIALOG_H_
-
-#include "ui/base/linux_ui.h"
-#include "ui/shell_dialogs/select_file_dialog.h"
-#include "ui/shell_dialogs/shell_dialogs_export.h"
-
-namespace ui {
-// This subclass of the base LinuxUI class provides a way for subclasses to
-// override the CreateSelectFileDialog function declared here to return
-// native file dialogs.
-class SHELL_DIALOGS_EXPORT LinuxUIShellDialog : public ui::LinuxUI {
- public:
-  virtual ~LinuxUIShellDialog() {}
-
-  // Returns a native file selection dialog.
-  virtual SelectFileDialog* CreateSelectFileDialog(
-      SelectFileDialog::Listener* listener,
-      SelectFilePolicy* policy) const = 0;
-};
-
-}  // namespace ui
-
-#endif  // UI_SHELL_DIALOGS_LINUX_UI_SHELL_DIALOG_H_
-