browser: Refactor the way to show the user data dir dialog.

chrome/browser/ui/views/user_data_dir_dialog.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.
-//
-// A dialog box that tells the user that we can't write to the specified user
-// data directory.  Provides the user a chance to pick a different directory.
-
-#ifndef CHROME_BROWSER_UI_VIEWS_USER_DATA_DIR_DIALOG_H_
-#define CHROME_BROWSER_UI_VIEWS_USER_DATA_DIR_DIALOG_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "base/message_loop.h"
-#include "chrome/browser/ui/select_file_dialog.h"
-#include "ui/views/window/dialog_delegate.h"
-
-class FilePath;
-
-namespace views {
-class MessageBoxView;
-}
-
-class UserDataDirDialog : public views::DialogDelegate,
-                          public MessageLoopForUI::Dispatcher,
-                          public SelectFileDialog::Listener {
- public:
-  // Creates and runs a user data directory picker dialog.  The method blocks
-  // while the dialog is showing.  If the user picks a directory, this method
-  // returns the chosen directory. |user_data_dir| is the value of the
-  // directory we were not able to use.
-  static FilePath RunUserDataDirDialog(const FilePath& user_data_dir);
-  virtual ~UserDataDirDialog();
-
-  FilePath user_data_dir() const { return user_data_dir_; }
-
-  // views::DialogDelegate methods:
-  virtual string16 GetDialogButtonLabel(ui::DialogButton button) const OVERRIDE;
-  virtual string16 GetWindowTitle() const OVERRIDE;
-  virtual void DeleteDelegate() OVERRIDE;
-  virtual bool Accept() OVERRIDE;
-  virtual bool Cancel() OVERRIDE;
-
-  // views::WidgetDelegate methods:
-  virtual views::View* GetContentsView() OVERRIDE;
-  virtual views::Widget* GetWidget() OVERRIDE;
-  virtual const views::Widget* GetWidget() const OVERRIDE;
-
-  // MessageLoop::Dispatcher method:
-  virtual bool Dispatch(const base::NativeEvent& msg) OVERRIDE;
-
-  // SelectFileDialog::Listener methods:
-  virtual void FileSelected(const FilePath& path,
-                            int index,
-                            void* params) OVERRIDE;
-  virtual void FileSelectionCanceled(void* params) OVERRIDE;
-
- private:
-  explicit UserDataDirDialog(const FilePath& user_data_dir);
-
-  // Empty until the user picks a directory.
-  FilePath user_data_dir_;
-
-  views::MessageBoxView* message_box_view_;
-  scoped_refptr<SelectFileDialog> select_file_dialog_;
-
-  // Used to keep track of whether or not to block the message loop (still
-  // waiting for the user to dismiss the dialog).
-  bool is_blocking_;
-
-  DISALLOW_COPY_AND_ASSIGN(UserDataDirDialog);
-};
-
-#endif  // CHROME_BROWSER_UI_VIEWS_USER_DATA_DIR_DIALOG_H_