Add NULL check in OnPdfToEmfConverted

chrome/browser/printing/print_view_manager_base.cc

 // Copyright 2013 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_view_manager_base.h"
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 116 matching lines @@
 
 void PrintViewManagerBase::OnDidGetDocumentCookie(int cookie) {
   cookie_ = cookie;
 }
 
 #if defined(WIN_PDF_METAFILE_FOR_PRINTING)
 void PrintViewManagerBase::OnPdfToEmfConverted(
     const PrintHostMsg_DidPrintPage_Params& params,
     double scale_factor,
     const std::vector<base::FilePath>& emf_files) {
+  if (!print_job_.get())
+    return;
+
   PrintedDocument* document = print_job_->document();
   if (!document)
     return;
 
   for (size_t i = 0; i < emf_files.size(); ++i) {
     scoped_ptr<printing::Emf> metafile(new printing::Emf);
     if (!metafile->InitFromFile(emf_files[i])) {
       NOTREACHED() << "Invalid metafile";
       web_contents()->Stop();
       return;
@@ skipping 442 matching lines @@
   scoped_refptr<printing::PrinterQuery> printer_query;
   printer_query = queue_->PopPrinterQuery(cookie);
   if (!printer_query)
     return;
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&PrinterQuery::StopWorker, printer_query.get()));
 }
 
 }  // namespace printing