PrintPreview:[MAC] Added "Open PDF In Preview" option to open the pdf in native preview app.

printing/printing_context_mac.mm

Index: printing/printing_context_mac.mm
diff --git a/printing/printing_context_mac.mm b/printing/printing_context_mac.mm
index 5b11c1898fe3ae5c9db9f5c677673bc1aeb8dff7..9c56ace7df298d8cea6da546b4f4bc41e18a0b66 100644
--- a/printing/printing_context_mac.mm
+++ b/printing/printing_context_mac.mm
@@ -124,6 +124,7 @@ PrintingContext::Result PrintingContextMac::UpdatePrinterSettings(
   }
 
   bool print_to_cloud = job_settings.HasKey(kSettingCloudPrintId);
+  bool open_pdf_in_preview = job_settings.HasKey(kSettingOpenPDFInPreview);
 
   if (!print_to_pdf && !print_to_cloud && !is_cloud_dialog) {
     if (!SetPrinter(device_name))
@@ -143,6 +144,11 @@ PrintingContext::Result PrintingContextMac::UpdatePrinterSettings(
     if (!SetOutputColor(color))
       return OnError();
   }
+  if (open_pdf_in_preview) {
+    if (!SetPrintPreviewJob())
+      return OnError();
+  }
+
   if (!UpdatePageFormatWithPaperInfo())
     return OnError();
 
@@ -155,6 +161,16 @@ PrintingContext::Result PrintingContextMac::UpdatePrinterSettings(
   return OK;
 }
 
+bool PrintingContextMac::SetPrintPreviewJob() {
+  PMPrintSession print_session =
+      static_cast<PMPrintSession>([print_info_.get() PMPrintSession]);
+  PMPrintSettings print_settings =
+      static_cast<PMPrintSettings>([print_info_.get() PMPrintSettings]);
+  return PMSessionSetDestination(
+      print_session, print_settings, kPMDestinationPreview,
+      NULL, NULL) == noErr;
+}
+
 void PrintingContextMac::InitPrintSettingsFromPrintInfo(
     const PageRanges& ranges) {
   PMPrintSession print_session =