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

content/child/ftp_directory_listing_response_delegate.cc

Index: content/child/ftp_directory_listing_response_delegate.cc
diff --git a/content/child/ftp_directory_listing_response_delegate.cc b/content/child/ftp_directory_listing_response_delegate.cc
index cc4df55687d920818e92cb3d6aa3e958bbda81e7..0a24bbf19414864757bf4c037ee7473941379ae1 100644
--- a/content/child/ftp_directory_listing_response_delegate.cc
+++ b/content/child/ftp_directory_listing_response_delegate.cc
@@ -111,8 +111,9 @@ void FtpDirectoryListingResponseDelegate::OnCompletedRequest() {
 }
 
 void FtpDirectoryListingResponseDelegate::Init(const GURL& response_url) {
-  net::UnescapeRule::Type unescape_rules = net::UnescapeRule::SPACES |
-                                           net::UnescapeRule::URL_SPECIAL_CHARS;
+  net::UnescapeRule::Type unescape_rules =
+      net::UnescapeRule::SPACES |
+      net::UnescapeRule::URL_SPECIAL_CHARS_EXCEPT_PATH_SEPARATORS;

[mmenke, 2016/03/23 16:49:00]

Note that this only affects display of the "Index of /blah/" line.  I could
write a test for this, but I only see browser tests for this file.  Easy enough
to write one of those that tests this, but seems like overkill.

   std::string unescaped_path = net::UnescapeURLComponent(response_url.path(),
                                                          unescape_rules);
   SendDataToClient(net::GetDirectoryListingHeader(