Printing: Load the source PDF only once.

chrome/service/service_utility_process_host.cc

Index: chrome/service/service_utility_process_host.cc
diff --git a/chrome/service/service_utility_process_host.cc b/chrome/service/service_utility_process_host.cc
index 24431254afd7082e5995855614aa3556828a0f8f..f2da6795bb612f6424357aad692e0bfe15de3568 100644
--- a/chrome/service/service_utility_process_host.cc
+++ b/chrome/service/service_utility_process_host.cc
@@ -97,7 +97,7 @@ class ServiceUtilityProcessHost::PdfToEmfState {
              const printing::PdfRenderSettings& conversion_settings) {
     if (!temp_dir_.CreateUniqueTempDir())
       return false;
-    return host_->Send(new ChromeUtilityMsg_RenderPDFPagesToMetafiles(
+    return host_->Send(new ChromeUtilityMsg_RenderPDFPagesToMetafiles_Start(
         IPC::TakePlatformFileForTransit(std::move(pdf_file)),
         conversion_settings, false /* print_text_with_gdi */));
   }