Revert "Printing: Load the source PDF only once."

chrome/service/service_utility_process_host.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/service/service_utility_process_host.h"
 
 #include <stdint.h>
 
 #include <queue>
 #include <utility>
@@ skipping 79 matching lines @@
 class ServiceUtilityProcessHost::PdfToEmfState {
  public:
   explicit PdfToEmfState(ServiceUtilityProcessHost* host)
       : host_(host), page_count_(0), current_page_(0), pages_in_progress_(0) {}
   ~PdfToEmfState() { Stop(); }
 
   bool Start(base::File pdf_file,
              const printing::PdfRenderSettings& conversion_settings) {
     if (!temp_dir_.CreateUniqueTempDir())
       return false;
-    return host_->Send(new ChromeUtilityMsg_RenderPDFPagesToMetafiles_Start(
+    return host_->Send(new ChromeUtilityMsg_RenderPDFPagesToMetafiles(
         IPC::TakePlatformFileForTransit(std::move(pdf_file)),
         conversion_settings, false /* print_text_with_gdi */));
   }
 
   void GetMorePages() {
     const int kMaxNumberOfTempFilesPerDocument = 3;
     while (pages_in_progress_ < kMaxNumberOfTempFilesPerDocument &&
            current_page_ < page_count_) {
       ++pages_in_progress_;
       emf_files_.push(CreateTempFile());
@@ skipping 346 matching lines @@
     return false;
   }
   printing::Emf emf;
   if (!emf.InitFromData(data.data(), data.size())) {
     OnRenderPDFPagesToMetafileDone(false);
     return false;
   }
   OnRenderPDFPagesToMetafilePageDone(scale_factor, emf);
   return true;
 }