Add Print Selection support to Chrome. This change is fairly involved since ...

chrome/browser/printing/print_job_worker.h

 // Copyright (c) 2006-2008 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__
 
 #include "base/task.h"
 #include "base/thread.h"
 #include "chrome/browser/printing/page_number.h"
@@ skipping 37 matching lines @@
   // NOTIFY_PRINTED_DOCUMENT_UPDATED notification. It's time to look again if
   // the next page can be printed.
   void OnNewPage();
 
   // This is the only function that can be called in a thread.
   void Cancel();
 
   // Cancels the Print... dialog box if shown, noop otherwise.
   void DismissDialog();
 
-  // Requests the missing pages in rendered_document_. Sends back a
-  // ALL_PAGES_REQUESTED notification once done.
-  void RequestMissingPages();
-
  protected:
   // Retrieves the context for testing only.
   PrintingContext& printing_context() { return printing_context_; }
 
  private:
   // The shared NotificationService service can only be accessed from the UI
   // thread, so this class encloses the necessary information to send the
   // notification from the right thread. Most NOTIFY_PRINT_JOB_EVENT
   // notifications are sent this way, except USER_INIT_DONE, USER_INIT_CANCELED
   // and DEFAULT_INIT_DONE. These three are sent through PrintJob::InitDone().
@@ skipping 31 matching lines @@
 template <>
 struct RunnableMethodTraits<printing::PrintJobWorker> {
   RunnableMethodTraits();
   void RetainCallee(printing::PrintJobWorker* obj);
   void ReleaseCallee(printing::PrintJobWorker* obj);
  private:
   scoped_refptr<printing::PrintJobWorkerOwner> owner_;
 };
 
 #endif  // CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_H__