Be able to print items that do window.print(); window.close() (airline tix e.g.)

chrome/browser/printing/print_preview_message_handler.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/printing/print_preview_message_handler.h"
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/ref_counted_memory.h"
@@ skipping 167 matching lines @@
   // Inform the print preview tab of the failure.
   TabContents* print_preview_tab = GetPrintPreviewTab();
   // User might have closed it already.
   if (!print_preview_tab)
     return;
 
   TabContentsWrapper* wrapper =
       TabContentsWrapper::GetCurrentWrapperForContents(print_preview_tab);
 
   if (g_browser_process->background_printing_manager()->
-          HasTabContents(wrapper)) {
+          HasPreviewTabContents(wrapper)) {
     // Preview tab was hidden to serve the print request.
     delete wrapper;
   } else {
     PrintPreviewUI* print_preview_ui =
       static_cast<PrintPreviewUI*>(print_preview_tab->web_ui());
     print_preview_ui->OnPrintPreviewFailed();
   }
 }
 
 void PrintPreviewMessageHandler::OnDidGetDefaultPageLayout(
@@ skipping 36 matching lines @@
 }
 
 void PrintPreviewMessageHandler::DidStartLoading() {
   if (tab_contents()->delegate() &&
       printing::PrintPreviewTabController::IsPrintPreviewTab(tab_contents())) {
     tab_contents()->SetContentRestrictions(CONTENT_RESTRICTION_PRINT);
   }
 }
 
 }  // namespace printing