Use document from preview for System Dialog printing on Windows.

chrome/browser/printing/printing_message_filter.h

Index: chrome/browser/printing/printing_message_filter.h
diff --git a/chrome/browser/printing/printing_message_filter.h b/chrome/browser/printing/printing_message_filter.h
index 7a16d2eced781c76469b71aa9390ca6eb8058e11..69150876738e041ac84e95f486af2029aabdd90c 100644
--- a/chrome/browser/printing/printing_message_filter.h
+++ b/chrome/browser/printing/printing_message_filter.h
@@ -33,6 +33,8 @@ class PrintJobManager;
 class PrintQueriesQueue;
 }
 
+class PrintingUIWebContentsObserver;
+
 // This class filters out incoming printing related IPC messages for the
 // renderer process on the IPC thread.
 class PrintingMessageFilter : public content::BrowserMessageFilter {
@@ -116,12 +118,24 @@ class PrintingMessageFilter : public content::BrowserMessageFilter {
   // Modify the current print settings based on |job_settings|. The task is
   // handled by the print worker thread and the UI thread. The reply occurs on
   // the IO thread.
-  void OnUpdatePrintSettings(int document_cookie,
+  void OnUpdatePrintSettings(int render_view_id,
+                             int document_cookie,
                              const base::DictionaryValue& job_settings,
                              IPC::Message* reply_msg);
+
+  typedef base::Callback<void(scoped_refptr<printing::PrinterQuery>)>
+      OnUpdatePrintSettingsCallback;
+
+  scoped_ptr<PrintingUIWebContentsObserver> OnUpdatePrintSettingsOnUIThread(
+      int render_view_id);
+  void OnUpdatePrintSettingsOnIOThread(
+      int document_cookie,
+      const OnUpdatePrintSettingsCallback& callback,
+      scoped_ptr<base::DictionaryValue> new_settings,
+      scoped_ptr<PrintingUIWebContentsObserver> wc_observer);
   void OnUpdatePrintSettingsReply(
-      scoped_refptr<printing::PrinterQuery> printer_query,
-      IPC::Message* reply_msg);
+      IPC::Message* reply_msg,
+      scoped_refptr<printing::PrinterQuery> printer_query);
 
 #if defined(ENABLE_FULL_PRINTING)
   // Check to see if print preview has been cancelled.