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 66990b19eabdc543c08b2798849d14e905f76b8a..64aa7d1108b3efe6c1d5ca696a5531f142595ae5 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -60,6 +60,7 @@
 #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"
@@ -3405,6 +3406,19 @@ void Browser::CloseContents(TabContents* source) {
     return;
   }
 
+  // Various sites have a pattern which open a new window with output formatted
+  // for printing, then include a print button, which does window.print();
+  // window.close(); An example is printing Virgin America boarding
+  // pass. Instead of closing, when a print tab is associated with this tab,
+  // tell the BackgroundPrintingManager to own it, which causes it to be
+  // hidden and eventually closed when the print window is closed.
+  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";