Set the job name for the print job on the Mac....

printing/printing_context_mac.mm

 // Copyright (c) 2009 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 "printing/printing_context.h"
 
 #import <ApplicationServices/ApplicationServices.h>
 #import <AppKit/AppKit.h>
 
 #include "base/logging.h"
@@ skipping 11 matching lines @@
       in_print_job_(false),
       abort_printing_(false) {
 }
 
 PrintingContext::~PrintingContext() {
   ResetSettings();
 }
 
 
 PrintingContext::Result PrintingContext::AskUserForSettings(
-    gfx::NativeWindow window, int max_pages, bool has_selection) {
+    gfx::NativeView parent_view, int max_pages, bool has_selection) {
   DCHECK([NSThread isMainThread]);
 
   // We deliberately don't feed max_pages into the dialog, because setting
   // NSPrintLastPage makes the print dialog pre-select the option to only print
   // a range.
 
   // TODO(stuartmorgan): implement 'print selection only' (probably requires
   // adding a new custom view to the panel on 10.5; 10.6 has
   // NSPrintPanelShowsPrintSelection).
   NSPrintPanel* panel = [NSPrintPanel printPanel];
+  NSPrintInfo* printInfo = [NSPrintInfo sharedPrintInfo];
 
   NSPrintPanelOptions options = [panel options];
   options |= NSPrintPanelShowsPaperSize;
   options |= NSPrintPanelShowsOrientation;
   options |= NSPrintPanelShowsScaling;
   [panel setOptions:options];
 
+  NSString* job_title = [[parent_view window] title];
+  PMPrintSettings printSettings = (PMPrintSettings)[printInfo PMPrintSettings];
+  PMPrintSettingsSetJobName(printSettings, (CFStringRef)job_title);

[stuartmorgan, 2010/05/12 18:54:43]

Do you need to nil-check job_title before calling this?

+  [printInfo updateFromPMPrintSettings];
+
   // TODO(stuartmorgan): We really want a tab sheet here, not a modal window.
   // Will require restructuring the PrintingContext API to use a callback.
   NSInteger selection =
-      [panel runModalWithPrintInfo:[NSPrintInfo sharedPrintInfo]];
+      [panel runModalWithPrintInfo:printInfo];
   if (selection != NSOKButton) {
     return CANCEL;
   }
 
   ParsePrintInfo([panel printInfo]);
   return OK;
 }
 
 PrintingContext::Result PrintingContext::UseDefaultSettings() {
   DCHECK(!in_print_job_);
@@ skipping 146 matching lines @@
 void PrintingContext::DismissDialog() {
   NOTIMPLEMENTED();
 }
 
 PrintingContext::Result PrintingContext::OnError() {
   ResetSettings();
   return abort_printing_ ? CANCEL : FAILED;
 }
 
 }  // namespace printing