Use AuthCredentials throughout the network stack instead of username/password.

net/websockets/websocket_job.cc

Index: net/websockets/websocket_job.cc
diff --git a/net/websockets/websocket_job.cc b/net/websockets/websocket_job.cc
index 18db83c8bad89bccde7dc38bc8e41889f3a03c72..4c64496d33e27e073bdcc8fc32bb0e1f37697afc 100644
--- a/net/websockets/websocket_job.cc
+++ b/net/websockets/websocket_job.cc
@@ -155,11 +155,9 @@ void WebSocketJob::Close() {
   CloseInternal();
 }
 
-void WebSocketJob::RestartWithAuth(
-    const string16& username,
-    const string16& password) {
+void WebSocketJob::RestartWithAuth(const AuthCredentials& credentials) {
   state_ = CONNECTING;
-  socket_->RestartWithAuth(username, password);
+  socket_->RestartWithAuth(credentials);
 }
 
 void WebSocketJob::DetachDelegate() {