File system path resolving

include/AdblockPlus/DefaultFileSystem.h

 #ifndef ADBLOCKPLUS_DEFAULT_FILE_SYSTEM_H
 #define ADBLOCKPLUS_DEFAULT_FILE_SYSTEM_H
 
 #include "FileSystem.h"
 
 namespace AdblockPlus
 {
   class DefaultFileSystem : public FileSystem
   {
   public:
     std::tr1::shared_ptr<std::istream> Read(const std::string& path) const;
     void Write(const std::string& path,
                std::tr1::shared_ptr<std::ostream> data);
     void Move(const std::string& fromPath,
                       const std::string& toPath);
     void Remove(const std::string& path);
     StatResult Stat(const std::string& path) const;
     std::string Resolve(const std::string& path) const;
+    void SetBasePath(const std::string& path);
 
   };
 }
 
 #endif