Correctly talk to VMS servers (translate UNIX paths to VMS and vice versa).

net/ftp/ftp_network_transaction.h

Index: net/ftp/ftp_network_transaction.h
diff --git a/net/ftp/ftp_network_transaction.h b/net/ftp/ftp_network_transaction.h
index 3366c71cd7735a6be2511e73c42a408d05d576de..e621a9bfbc41e8be768869b14b81a28c8f59048c 100644
--- a/net/ftp/ftp_network_transaction.h
+++ b/net/ftp/ftp_network_transaction.h
@@ -85,6 +85,15 @@ class FtpNetworkTransaction : public FtpTransaction {
     ERROR_CLASS_PERMANENT_ERROR,
   };
 
+  // Major categories of remote system types, as returned by SYST command.
+  enum SystemType {
+    SYSTEM_TYPE_UNKNOWN,
+    SYSTEM_TYPE_UNIX,
+    SYSTEM_TYPE_WINDOWS,
+    SYSTEM_TYPE_OS2,
+    SYSTEM_TYPE_VMS,
+  };
+
   // Resets the members of the transaction so it can be restarted.
   void ResetStateForRestart();
 
@@ -101,8 +110,9 @@ class FtpNetworkTransaction : public FtpTransaction {
   // code to be in range 100-599.
   static ErrorClass GetErrorClass(int response_code);
 
-  // Returns request path suitable to be included in an FTP command.
-  std::string GetRequestPathForFtpCommand() const;
+  // Returns request path suitable to be included in an FTP command. If the path
+  // will be used as a directory, |is_directory| should be true.
+  std::string GetRequestPathForFtpCommand(bool is_directory) const;
 
   // Runs the state transition loop.
   int DoLoop(int result);
@@ -190,11 +200,17 @@ class FtpNetworkTransaction : public FtpTransaction {
 
   int last_error_;
 
+  SystemType system_type_;
+
   // We get username and password as wstrings in RestartWithAuth, so they are
   // also kept as wstrings here.
   std::wstring username_;
   std::wstring password_;
 
+  // Current directory on the remote server, as returned by last PWD command,
+  // with any trailing slash removed.
+  std::string current_remote_directory_;
+
   bool retr_failed_;
 
   int data_connection_port_;