Copy AuthCache from main request context into webrtc context

jingle/glue/proxy_resolving_client_socket.cc

Index: jingle/glue/proxy_resolving_client_socket.cc
diff --git a/jingle/glue/proxy_resolving_client_socket.cc b/jingle/glue/proxy_resolving_client_socket.cc
index d77588e8328c97694fe05756562055def6cc083a..9fbb4ce339bd312eafc12e0a5015d9ef888964c0 100644
--- a/jingle/glue/proxy_resolving_client_socket.cc
+++ b/jingle/glue/proxy_resolving_client_socket.cc
@@ -17,6 +17,7 @@
 #include "net/base/net_errors.h"
 #include "net/http/http_auth_controller.h"
 #include "net/http/http_network_session.h"
+#include "net/http/http_transaction_factory.h"
 #include "net/http/proxy_client_socket.h"
 #include "net/log/net_log_source_type.h"
 #include "net/socket/client_socket_handle.h"
@@ -95,6 +96,13 @@ ProxyResolvingClientSocket::ProxyResolvingClientSocket(
   }
 
   network_session_.reset(new net::HttpNetworkSession(session_params));
+
+  net::HttpAuthCache* other_auth_cache =
+      request_context->http_transaction_factory()
+          ->GetSession()
+          ->http_auth_cache();
+  DCHECK(other_auth_cache);
+  network_session_->http_auth_cache()->UpdateAllFrom(*other_auth_cache);
 }
 
 ProxyResolvingClientSocket::~ProxyResolvingClientSocket() {