[WIP] make GURL::path() return a StringPiece

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 ba0f07476702f6bf3160b8bbf0b07b2549931f81..39ac464172b1441b2264c654d35612d911796e3c 100644
--- a/content/child/ftp_directory_listing_response_delegate.cc
+++ b/content/child/ftp_directory_listing_response_delegate.cc
@@ -115,8 +115,8 @@ void FtpDirectoryListingResponseDelegate::Init(const GURL& response_url) {
   net::UnescapeRule::Type unescape_rules =
       net::UnescapeRule::SPACES |
       net::UnescapeRule::URL_SPECIAL_CHARS_EXCEPT_PATH_SEPARATORS;
-  std::string unescaped_path = net::UnescapeURLComponent(response_url.path(),
-                                                         unescape_rules);
+  std::string unescaped_path = net::UnescapeURLComponent(
+      response_url.path().as_string(), unescape_rules);
   SendDataToClient(net::GetDirectoryListingHeader(
       ConvertPathToUTF16(unescaped_path)));