Support Sync following Gaia OAuth authentication

chrome/browser/sync/sync_setup_wizard.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_SYNC_SETUP_WIZARD_H_
 #define CHROME_BROWSER_SYNC_SYNC_SETUP_WIZARD_H_
 #pragma once
 
 #include "base/basictypes.h"
 
@@ skipping 48 matching lines @@
   // new dialog starting at |advance_state|.  If the wizard has never run
   // through to completion, it will always attempt to do so.  Otherwise, e.g
   // for a transient auth failure, it will just run as far as is necessary
   // based on |advance_state| (so for auth failure, up to GAIA_SUCCESS).
   void Step(State advance_state);
 
   // Whether or not a dialog is currently showing.  Useful to determine
   // if various buttons in the UI should be enabled or disabled.
   bool IsVisible() const;
 
+  // Returns true iff Sync is using OAuth-based authentication.  See also
+  // GetLoginState().
+  static bool IsUsingOAuth();
+
   // Returns either GAIA_LOGIN or OAUTH_LOGIN depending on which
   // authentication scheme is in force.
   static State GetLoginState();
 
   // Focus the dialog if it is already open.  Does nothing if the dialog is
   // not visible.
   void Focus();
 
   // Attaches |handler| to the flow contained in |flow_container_|. Returns NULL
   // if the flow does not exist or if an existing handler is already attached to
   // the flow.
   SyncSetupFlow* AttachSyncSetupHandler(SyncSetupFlowHandler* handler);
 
  private:
   ProfileSyncService* service_;
 
   SyncSetupFlowContainer* flow_container_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncSetupWizard);
 };
 
 #endif  // CHROME_BROWSER_SYNC_SYNC_SETUP_WIZARD_H_