Removed superfluous dcheck.

chrome/browser/ui/webui/sync_setup_handler.cc

 // 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.
 
 #include "chrome/browser/ui/webui/sync_setup_handler.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
@@ skipping 811 matching lines @@
     return;
   }
 #endif
 
   // Bring up the existing wizard, or just display it on this page.
   if (!FocusExistingWizardIfPresent())
     OpenSyncSetup(false);
 }
 
 void SyncSetupHandler::HandleShowSetupUI(const ListValue* args) {
-  DCHECK(!configuring_sync_);
   OpenSyncSetup(false);
 }
 
 void SyncSetupHandler::HandleStopSyncing(const ListValue* args) {
   ProfileSyncService* service = GetSyncService();
   DCHECK(service);
 
   if (ProfileSyncService::IsSyncEnabled()) {
     service->DisableForUser();
     ProfileSyncService::SyncEvent(ProfileSyncService::STOP_FROM_OPTIONS);
@@ skipping 162 matching lines @@
     if (i != current_profile_index && AreUserNamesEqual(
         cache.GetUserNameOfProfileAtIndex(i), username_utf16)) {
       *error_message = l10n_util::GetStringUTF16(
           IDS_SYNC_USER_NAME_IN_USE_ERROR);
       return false;
     }
   }
 
   return true;
 }