The login dialog was being opened with the main browser window as a parent in...

chrome/browser/views/bookmark_bar_view.cc

 // Copyright (c) 2009 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/views/bookmark_bar_view.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 #include <vector>
@@ skipping 1112 matching lines @@
                             anchor_point, false);
 }
 
 void BookmarkBarView::ButtonPressed(views::Button* sender,
                                     const views::Event& event) {
 #ifdef CHROME_PERSONALIZATION
   // Show the login wizard if the user clicked the re-login button.
   if (sender->tag() == kSyncErrorButtonTag) {
     DCHECK(sender == sync_error_button_);
     DCHECK(sync_service_);
-    sync_service_->ShowLoginDialog();
+    sync_service_->ShowLoginDialog(NULL);
     return;
   }
 #endif
 
   const BookmarkNode* node;
   if (sender->tag() == kOtherFolderButtonTag) {
     node = model_->other_node();
   } else {
     int index = GetChildIndex(sender);
     DCHECK_NE(-1, index);
@@ skipping 589 matching lines @@
   sync_error_button->SetTooltipText(
       l10n_util::GetString(IDS_SYNC_BOOKMARK_BAR_ERROR_DESC));
   sync_error_button->SetAccessibleName(
       l10n_util::GetString(IDS_ACCNAME_SYNC_ERROR_BUTTON));
   sync_error_button->SetIcon(
       *ResourceBundle::GetSharedInstance().GetBitmapNamed(IDR_WARNING));
   return sync_error_button;
 }
 #endif