On windows filepaths need \\?\ prefix to allow extended file path names. Fix ...

webkit/fileapi/file_system_path_manager.h

Index: webkit/fileapi/file_system_path_manager.h
===================================================================
--- webkit/fileapi/file_system_path_manager.h	(revision 67172)
+++ webkit/fileapi/file_system_path_manager.h	(working copy)
@@ -28,6 +28,8 @@
                         bool allow_file_access_from_files);
   ~FileSystemPathManager();
 
+  static FilePath GetFileSystemCommonRootDirectory(const FilePath& root_path);
+
   // Callback for GetFileSystemRootPath.
   // If the request is accepted and the root filesystem for the origin exists
   // the callback is called with success=true and valid root_path and name.
@@ -82,7 +84,7 @@
 
   scoped_refptr<base::MessageLoopProxy> file_message_loop_;
 
-  const FilePath base_path_;
+  FilePath base_path_;

[ericu, 2010/11/25 04:18:35]

Why remove the const?

   const bool is_incognito_;
   const bool allow_file_access_from_files_;