Printing: Load the source PDF only once.

chrome/browser/printing/pdf_to_emf_converter.cc

 // Copyright 2014 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/pdf_to_emf_converter.h"
 
 #include <stdint.h>
 #include <windows.h>
 
 #include <memory>
@@ skipping 322 matching lines @@
       base::Bind(&PdfToEmfUtilityProcessHostClient::OnTempPdfReady, this,
                  print_text_with_gdi));
 }
 
 void PdfToEmfUtilityProcessHostClient::OnTempPdfReady(bool print_text_with_gdi,
                                                       ScopedTempFile pdf) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   if (!utility_process_host_ || !pdf)
     return OnFailed();
   // Should reply with OnPageCount().
-  Send(new ChromeUtilityMsg_RenderPDFPagesToMetafiles(
+  Send(new ChromeUtilityMsg_RenderPDFPagesToMetafiles_Start(
       IPC::GetPlatformFileForTransit(pdf->GetPlatformFile(), false), settings_,
       print_text_with_gdi));
 }
 
 void PdfToEmfUtilityProcessHostClient::OnPageCount(int page_count) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   if (start_callback_.is_null())
     return OnFailed();
   BrowserThread::PostTask(BrowserThread::UI,
                           FROM_HERE,
@@ skipping 187 matching lines @@
 
 PdfToEmfConverter::~PdfToEmfConverter() {
 }
 
 // static
 std::unique_ptr<PdfToEmfConverter> PdfToEmfConverter::CreateDefault() {
   return std::unique_ptr<PdfToEmfConverter>(new PdfToEmfConverterImpl());
 }
 
 }  // namespace printing