Pre- and Auto-login should not log the user out of an already signed in

chrome/browser/sync/signin_manager.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/signin_manager.h"
 
 #include "base/command_line.h"
 #include "base/string_util.h"
 #include "chrome/browser/net/gaia/token_service.h"
 #include "chrome/browser/prefs/pref_service.h"
@@ skipping 312 matching lines @@
 
   // If a GAIA service token has become available, use it to pre-login the
   // user to other services that depend on GAIA credentials.
   if (tok_details->service() == GaiaConstants::kGaiaService) {
     if (client_login_.get() == NULL) {
       client_login_.reset(new GaiaAuthFetcher(this,
                                               GaiaConstants::kChromeSource,
                                               profile_->GetRequestContext()));
     }
 
-    client_login_->StartTokenAuth(tok_details->token());
+    client_login_->StartMergeSession(tok_details->token());
 
     // We only want to do this once per sign-in.
     CleanupNotificationRegistration();
   }
 #endif
 }