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

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index 0c8c5e65f25b9893efbb74b76db810e5d525d2c3..830bfef795aba91b5485613e72f5bdf68eaaf4ff 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -57,7 +57,9 @@
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/printing/background_printing_manager.h"
 #include "chrome/browser/printing/cloud_print/cloud_print_setup_flow.h"
+#include "chrome/browser/printing/print_preview_tab_controller.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/restore_tab_helper.h"
 #include "chrome/browser/sessions/session_service.h"
@@ -3202,6 +3204,13 @@ void Browser::CloseContents(TabContents* source) {
     return;
   }
 
+  TabContentsWrapper* tab_wrapper =
+      TabContentsWrapper::GetCurrentWrapperForContents(source);
+  if (g_browser_process->background_printing_manager()->
+          OwnInitiatorTabContents(tab_wrapper)) {
+    return;
+  }
+
   int index = tab_handler_->GetTabStripModel()->GetWrapperIndex(source);
   if (index == TabStripModel::kNoTab) {
     NOTREACHED() << "CloseContents called for tab not in our strip";