Fix a crash on showing sync setup dialog in guest mode.

chrome/browser/ui/webui/sync_setup_handler.h

 // Copyright (c) 2012 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_UI_WEBUI_SYNC_SETUP_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_SYNC_SETUP_HANDLER_H_
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/timer/timer.h"
@@ skipping 43 matching lines @@
   // gets ready.
   void OpenConfigureSync();
 
   // Terminates the sync setup flow.
   void CloseSyncSetup();
 
  protected:
   friend class SyncSetupHandlerTest;
   FRIEND_TEST_ALL_PREFIXES(SyncSetupHandlerTest,
                            DisplayConfigureWithBackendDisabledAndCancel);
+  FRIEND_TEST_ALL_PREFIXES(SyncSetupHandlerTest, HandleSetupUIWhenSyncDisabled);
   FRIEND_TEST_ALL_PREFIXES(SyncSetupHandlerTest, SelectCustomEncryption);
   FRIEND_TEST_ALL_PREFIXES(SyncSetupHandlerTest, ShowSyncSetupWhenNotSignedIn);
   FRIEND_TEST_ALL_PREFIXES(SyncSetupHandlerTest, SuccessfullySetPassphrase);
   FRIEND_TEST_ALL_PREFIXES(SyncSetupHandlerTest, TestSyncEverything);
   FRIEND_TEST_ALL_PREFIXES(SyncSetupHandlerTest, TestSyncNothing);
   FRIEND_TEST_ALL_PREFIXES(SyncSetupHandlerTest, TestSyncAllManually);
   FRIEND_TEST_ALL_PREFIXES(SyncSetupHandlerTest, TestPassphraseStillRequired);
   FRIEND_TEST_ALL_PREFIXES(SyncSetupHandlerTest, TestSyncIndividualTypes);
   FRIEND_TEST_ALL_PREFIXES(SyncSetupHandlerTest, TurnOnEncryptAll);
   FRIEND_TEST_ALL_PREFIXES(SyncSetupHandlerTest, UnsuccessfullySetPassphrase);
@@ skipping 85 matching lines @@
   ProfileManager* const profile_manager_;
 
   // The OneShotTimer object used to timeout of starting the sync backend
   // service.
   scoped_ptr<base::OneShotTimer<SyncSetupHandler> > backend_start_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncSetupHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SYNC_SETUP_HANDLER_H_