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diff --git a/chrome/browser/user_data_dir_dialog.h b/chrome/browser/user_data_dir_dialog.h
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// 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_USER_DATA_DIR_DIALOG_H__
+#define CHROME_BROWSER_USER_DATA_DIR_DIALOG_H__
+
+#include "base/basictypes.h"
+#include "base/message_loop.h"
+#include "chrome/browser/shell_dialogs.h"
+#include "chrome/views/dialog_delegate.h"
+
+class MessageBoxView;
+namespace ChromeViews {
+class Window;
+}
+
+class UserDataDirDialog : public ChromeViews::DialogDelegate,
+                          public MessageLoop::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 std::wstring RunUserDataDirDialog(const std::wstring& user_data_dir);
+  virtual ~UserDataDirDialog();
+
+  std::wstring user_data_dir() { return user_data_dir_; }
+
+  // ChromeViews::DialogDelegate Methods:
+  virtual int GetDialogButtons() const;
+  virtual std::wstring GetDialogButtonLabel(DialogButton button) const;
+  virtual std::wstring GetWindowTitle() const;
+  virtual void WindowClosing();
+  virtual bool Accept();
+  virtual bool Cancel();
+
+  // ChromeViews::WindowDelegate Methods:
+  virtual bool IsAlwaysOnTop() const { return false; }
+  virtual bool IsModal() const { return false; }
+
+  // MessageLoop::Dispatcher Method:
+  virtual bool Dispatch(const MSG& msg);
+
+  // SelectFileDialog::Listener Methods:
+  virtual void FileSelected(const std::wstring& path, void* params);
+  virtual void FileSelectionCanceled(void* params);
+
+ private:
+  explicit UserDataDirDialog(const std::wstring& user_data_dir);
+
+  // Empty until the user picks a directory.
+  std::wstring user_data_dir_;
+
+  MessageBoxView* message_box_view_;
+  ChromeViews::Window* message_box_window_;
+  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_EVIL_CONSTRUCTORS(UserDataDirDialog);
+};
+
+#endif // CHROME_BROWSER_USER_DATA_DIR_DIALOG_H__