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

chrome/browser/printing/background_printing_manager.h

Index: chrome/browser/printing/background_printing_manager.h
diff --git a/chrome/browser/printing/background_printing_manager.h b/chrome/browser/printing/background_printing_manager.h
index 4d935fa89d8266f91f85ac831706618c7c5ac365..6a7ed31d30761d548ae23a51207176458b72e2ef 100644
--- a/chrome/browser/printing/background_printing_manager.h
+++ b/chrome/browser/printing/background_printing_manager.h
@@ -30,24 +30,55 @@ class BackgroundPrintingManager
   // Takes ownership of |content| and deletes it when |content| finishes
   // printing. This removes the TabContentsWrapper from its TabStrip and
   // hides it from the user.
-  void OwnTabContents(TabContentsWrapper* content);
+  void OwnPreviewTabContents(TabContentsWrapper* content);
+
+  // Takes ownership of |content| and deletes it when its preview tab is
+  // destroyed by either being canceled, closed or finishing printing. This
+  // removes the TabContentsWrapper from its TabStrip and hides it from the
+  // user.
+  // Returns true if content has an associated print preview tab.
+  bool OwnInitiatorTabContents(TabContentsWrapper* content);
+
+  // Called when we no longer need to access the initiator tab, deletes if
+  // currently owned. Returns true when |content| was owned.
+  bool ReleaseInitiatorTabContents(TabContentsWrapper* content);
 
   // Let others iterate over the list of background printing tabs.
   std::set<TabContentsWrapper*>::const_iterator begin();
   std::set<TabContentsWrapper*>::const_iterator end();
 
+  // Let others iterate over the list of background initiator tabs.
+  std::set<TabContentsWrapper*>::const_iterator begin_initiator();
+  std::set<TabContentsWrapper*>::const_iterator end_initiator();
+
   // Returns true if |printing_contents_| contains |entry|.
   bool HasTabContents(TabContentsWrapper* entry);
 
+  // Returns true if |initiator_contents_| contains |entry|.
+  bool HasInitiatorTabContents(TabContentsWrapper* entry);
+
   // NotificationObserver overrides:
   virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details) OVERRIDE;
 
  private:
+  typedef std::set<TabContentsWrapper*> TabContentsWrapperSet;
+
+  // Takes ownership of |content| and deletes it when its preview tab is
+  // destroyed by either being canceled, closed or finishing printing. This
+  // removes the TabContentsWrapper from its TabStrip and hides it from the
+  // user.
+  void OwnTabContents(TabContentsWrapper* content,
+                      TabContentsWrapper* source_content,
+                      TabContentsWrapperSet* wrapper_set);
+
   // The set of tabs managed by BackgroundPrintingManager.
   std::set<TabContentsWrapper*> printing_contents_;
 
+  // The set of tabs managed by BackgroundPrintingManager.
+  std::set<TabContentsWrapper*> initiator_contents_;
+
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundPrintingManager);