Printing: Keep track of WebContents lifetime for the native printing UI.

chrome/browser/printing/print_job_worker.h

 // Copyright (c) 2012 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.
 
-#ifndef CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_H__
-#define CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_H__
+#ifndef CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_H_
+#define CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread.h"
 #include "printing/page_number.h"
 #include "printing/print_destination_interface.h"
 #include "printing/printing_context.h"
 #include "printing/print_job_constants.h"
-#include "ui/gfx/native_widget_types.h"
+
+class PrintingUIWebContentsObserver;
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace printing {
 
 class PrintedDocument;
 class PrintedPage;
 class PrintJob;
@@ skipping 11 matching lines @@
   virtual ~PrintJobWorker();
 
   void SetNewOwner(PrintJobWorkerOwner* new_owner);
 
   // Set a destination for print.
   // This supercedes the document's rendering destination.
   void SetPrintDestination(PrintDestinationInterface* destination);
 
   // Initializes the print settings. If |ask_user_for_settings| is true, a
   // Print... dialog box will be shown to ask the user his preference.
-  void GetSettings(bool ask_user_for_settings,
-                   gfx::NativeView parent_view,
-                   int document_page_count,
-                   bool has_selection,
-                   MarginType margin_type);
+  void GetSettings(
+      bool ask_user_for_settings,
+      scoped_ptr<PrintingUIWebContentsObserver> web_contents_observer,
+      int document_page_count,
+      bool has_selection,
+      MarginType margin_type);
 
   // Set the new print settings. This function takes ownership of
   // |new_settings|.
   void SetSettings(const base::DictionaryValue* const new_settings);
 
   // Starts the printing loop. Every pages are printed as soon as the data is
   // available. Makes sure the new_document is the right one.
   void StartPrinting(PrintedDocument* new_document);
 
   // Updates the printed document.
@@ skipping 25 matching lines @@
   // Closes the job since spooling is done.
   void OnDocumentDone();
 
   // Discards the current document, the current page and cancels the printing
   // context.
   void OnFailure();
 
   // Asks the user for print settings. Must be called on the UI thread.
   // Required on Mac and Linux. Windows can display UI from non-main threads,
   // but sticks with this for consistency.
-  void GetSettingsWithUI(gfx::NativeView parent_view,
-                         int document_page_count,
-                         bool has_selection);
+  void GetSettingsWithUI(
+      scoped_ptr<PrintingUIWebContentsObserver> web_contents_observer,
+      int document_page_count,
+      bool has_selection);
 
   // The callback used by PrintingContext::GetSettingsWithUI() to notify this
   // object that the print settings are set.  This is needed in order to bounce
   // back into the IO thread for GetSettingsDone().
   void GetSettingsWithUIDone(PrintingContext::Result result);
 
   // Called on the UI thread to update the print settings. This function takes
   // the ownership of |new_settings|.
   void UpdatePrintSettings(const base::DictionaryValue* const new_settings);
 
@@ skipping 22 matching lines @@
   PageNumber page_number_;
 
   // Used to generate a WeakPtr for callbacks.
   base::WeakPtrFactory<PrintJobWorker> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintJobWorker);
 };
 
 }  // namespace printing
 
-#endif  // CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_H__
+#endif  // CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_H_