Clean up FtpTransactionFacory ownership.

chrome/browser/io_thread.h

Index: chrome/browser/io_thread.h
diff --git a/chrome/browser/io_thread.h b/chrome/browser/io_thread.h
index 5d20997d0bc3fa7c76016fd622a183f04f3178ff..b5a2a9def93e80f18abf90160f4cb8201049ad0d 100644
--- a/chrome/browser/io_thread.h
+++ b/chrome/browser/io_thread.h
@@ -74,7 +74,6 @@ class CertVerifier;
 class ChannelIDService;
 class CookieStore;
 class CTLogVerifier;
-class FtpTransactionFactory;
 class HostMappingRules;
 class HostResolver;
 class HttpAuthHandlerRegistryFactory;
@@ -164,8 +163,6 @@ class IOThread : public content::BrowserThreadDelegate {
         proxy_script_fetcher_http_network_session;
     std::unique_ptr<net::HttpTransactionFactory>
         proxy_script_fetcher_http_transaction_factory;
-    std::unique_ptr<net::FtpTransactionFactory>
-        proxy_script_fetcher_ftp_transaction_factory;
     std::unique_ptr<net::URLRequestJobFactory>
         proxy_script_fetcher_url_request_job_factory;
     std::unique_ptr<net::HttpAuthPreferences> http_auth_preferences;