Fix handling of escaped slashes ("%2f") in FTP paths.

net/ftp/ftp_network_transaction.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/ftp/ftp_network_transaction.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 469 matching lines @@
     std::string::size_type pos = gurl_path.rfind(';');
     if (pos != std::string::npos)
       gurl_path.resize(pos);
 
     path.append(gurl_path);
   }
   // Make sure that if the path is expected to be a file, it won't end
   // with a trailing slash.
   if (!is_directory && path.length() > 1 && path.back() == '/')
     path.erase(path.length() - 1);
-  UnescapeRule::Type unescape_rules = UnescapeRule::SPACES |
-                                      UnescapeRule::URL_SPECIAL_CHARS;
+  UnescapeRule::Type unescape_rules =
+      UnescapeRule::SPACES |
+      UnescapeRule::URL_SPECIAL_CHARS_EXCEPT_PATH_SEPARATORS;
   // This may unescape to non-ASCII characters, but we allow that. See the
   // comment for IsValidFTPCommandString.
   path = UnescapeURLComponent(path, unescape_rules);
 
   if (system_type_ == SYSTEM_TYPE_VMS) {
     if (is_directory)
       path = FtpUtil::UnixDirectoryPathToVMS(path);
     else
       path = FtpUtil::UnixFilePathToVMS(path);
   }
@@ skipping 870 matching lines @@
   if (!had_error_type[type]) {
     had_error_type[type] = true;
     UMA_HISTOGRAM_ENUMERATION("Net.FtpDataConnectionErrorHappened",
         type, NUM_OF_NET_ERROR_TYPES);
   }
   UMA_HISTOGRAM_ENUMERATION("Net.FtpDataConnectionErrorCount",
       type, NUM_OF_NET_ERROR_TYPES);
 }
 
 }  // namespace net