Remove signin and persist from gaia_authenticator.

chrome/browser/sync/engine/net/server_connection_manager.h

Index: chrome/browser/sync/engine/net/server_connection_manager.h
diff --git a/chrome/browser/sync/engine/net/server_connection_manager.h b/chrome/browser/sync/engine/net/server_connection_manager.h
index 078e7f85850770b2fbceac30e2b2f8d49d233a5c..188b4ba7f74f4525009a01c0d49616fd1dd8bdd0 100644
--- a/chrome/browser/sync/engine/net/server_connection_manager.h
+++ b/chrome/browser/sync/engine/net/server_connection_manager.h
@@ -18,7 +18,6 @@
 #include "chrome/browser/sync/util/sync_types.h"
 #include "chrome/common/deprecated/event_sys.h"
 #include "chrome/common/net/http_return.h"
-#include "chrome/common/net/gaia/signin.h"
 
 namespace syncable {
 class WriteTransaction;
@@ -254,8 +253,6 @@ class ServerConnectionManager {
 
   const std::string client_id() const { return client_id_; }
 
-  void SetDomainFromSignIn(gaia::SignIn signin_type, const std::string& signin);
-
   // This changes the server info used by the connection manager. This allows
   // a single client instance to talk to different backing servers. This is
   // typically called during / after authentication so that the server url