Improvements in --debug-print switch implementation.

chrome/browser/printing/print_job.cc

 // 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.
 
 #include "chrome/browser/printing/print_job.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/threading/worker_pool.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/printing/print_job_worker.h"
+#include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_service.h"
 #include "printing/printed_document.h"
 #include "printing/printed_page.h"
 
 using base::TimeDelta;
 
 namespace {
 
 // Helper function to ensure |owner| is valid until at least |callback| returns.
 void HoldRefCallback(const scoped_refptr<printing::PrintJobWorkerOwner>& owner,
@@ skipping 36 matching lines @@
                           int page_count) {
   DCHECK(!source_);
   DCHECK(!worker_.get());
   DCHECK(!is_job_pending_);
   DCHECK(!is_canceling_);
   DCHECK(!document_.get());
   source_ = source;
   worker_.reset(job->DetachWorker(this));
   settings_ = job->settings();
 
-  PrintedDocument* new_doc =
-      new PrintedDocument(settings_, source_, job->cookie());
+  using content::BrowserThread;
+  PrintedDocument* new_doc = new PrintedDocument(
+      settings_,
+      source_,
+      job->cookie(),
+      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE));

[Lei Zhang, 2014/06/11 21:43:42]

Can you use BrowserThread::GetBlockingPool() instead?

[Vitaly Buka (NO REVIEWS), 2014/06/11 22:22:58]

Done.

   new_doc->set_page_count(page_count);
   UpdatePrintedDocument(new_doc);
 
   // Don't forget to register to our own messages.
   registrar_.Add(this, chrome::NOTIFICATION_PRINT_JOB_EVENT,
                  content::Source<PrintJob>(this));
 }
 
 void PrintJob::Observe(int type,
                        const content::NotificationSource& source,
@@ skipping 271 matching lines @@
 }
 
 JobEventDetails::~JobEventDetails() {
 }
 
 PrintedDocument* JobEventDetails::document() const { return document_.get(); }
 
 PrintedPage* JobEventDetails::page() const { return page_.get(); }
 
 }  // namespace printing