Revert of Rename PrivateMode enum values:

net/http/http_stream_factory_impl_job.cc

Index: net/http/http_stream_factory_impl_job.cc
diff --git a/net/http/http_stream_factory_impl_job.cc b/net/http/http_stream_factory_impl_job.cc
index b23ec2a912a1b2aca438fdeb9501faa7728531b8..09b58d403e7b193bfc41f4f77e04d99d48502c86 100644
--- a/net/http/http_stream_factory_impl_job.cc
+++ b/net/http/http_stream_factory_impl_job.cc
@@ -1092,7 +1092,7 @@
     // We never use privacy mode for connection to proxy server.
     spdy_session_key = SpdySessionKey(proxy_server.host_port_pair(),
                                       ProxyServer::Direct(),
-                                      PRIVACY_MODE_DISABLED);
+                                      kPrivacyModeDisabled);
     direct = false;
   }
 
@@ -1278,7 +1278,7 @@
     ssl_config->verify_ev_cert = true;
 
   // Disable Channel ID if privacy mode is enabled.
-  if (request_info_.privacy_mode == PRIVACY_MODE_ENABLED)
+  if (request_info_.privacy_mode == kPrivacyModeEnabled)
     ssl_config->channel_id_enabled = false;
 }