Use document from preview for System Dialog printing on Windows.

chrome/browser/printing/printer_query.h

Index: chrome/browser/printing/printer_query.h
diff --git a/chrome/browser/printing/printer_query.h b/chrome/browser/printing/printer_query.h
index 7633c4e8bb43cbe080e441fb533f59b3a149d861..e4fe86220d5cbb688ad04e0d97635275b3968170 100644
--- a/chrome/browser/printing/printer_query.h
+++ b/chrome/browser/printing/printer_query.h
@@ -53,8 +53,10 @@ class PrinterQuery : public PrintJobWorkerOwner {
       const base::Closure& callback);
 
   // Updates the current settings with |new_settings| dictionary values.
-  void SetSettings(const base::DictionaryValue& new_settings,
-                   const base::Closure& callback);
+  void SetSettings(
+      scoped_ptr<PrintingUIWebContentsObserver> web_contents_observer,
+      scoped_ptr<base::DictionaryValue> new_settings,
+      const base::Closure& callback);
 
   // Set a destination for the worker.
   void SetWorkerDestination(PrintDestinationInterface* destination);