Use FilePath in UserDataDirDialog to remove the use of FilePath::FromWString...

chrome/browser/views/user_data_dir_dialog.h

Index: chrome/browser/views/user_data_dir_dialog.h
===================================================================
--- chrome/browser/views/user_data_dir_dialog.h	(revision 29381)
+++ chrome/browser/views/user_data_dir_dialog.h	(working copy)
@@ -13,6 +13,7 @@
 #include "chrome/browser/shell_dialogs.h"
 #include "views/window/dialog_delegate.h"
 
+class FilePath;
 class MessageBoxView;
 namespace views {
 class Window;
@@ -26,10 +27,10 @@
   // 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);
+  static FilePath RunUserDataDirDialog(const FilePath& user_data_dir);
   virtual ~UserDataDirDialog();
 
-  std::wstring user_data_dir() { return user_data_dir_; }
+  FilePath user_data_dir() const { return user_data_dir_; }
 
   // views::DialogDelegate Methods:
   virtual std::wstring GetDialogButtonLabel(
@@ -52,10 +53,10 @@
   virtual void FileSelectionCanceled(void* params);
 
  private:
-  explicit UserDataDirDialog(const std::wstring& user_data_dir);
+  explicit UserDataDirDialog(const FilePath& user_data_dir);
 
   // Empty until the user picks a directory.
-  std::wstring user_data_dir_;
+  FilePath user_data_dir_;
 
   MessageBoxView* message_box_view_;
   scoped_refptr<SelectFileDialog> select_file_dialog_;
@@ -64,7 +65,7 @@
   // waiting for the user to dismiss the dialog).
   bool is_blocking_;
 
-  DISALLOW_EVIL_CONSTRUCTORS(UserDataDirDialog);
+  DISALLOW_COPY_AND_ASSIGN(UserDataDirDialog);
 };
 
 #endif // CHROME_BROWSER_USER_DATA_DIR_DIALOG_H__