Print Preview: Hook up the print button to initiate printing without displaying a print dialog.

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 686a2fbe58e707e536f48404e1525fd4712afdbe..e2c9c3cd615438bbd91eb1096eec4af0ffae4bd0 100644
--- a/chrome/browser/printing/printing_message_filter.h
+++ b/chrome/browser/printing/printing_message_filter.h
@@ -12,6 +12,7 @@
 #include "base/shared_memory.h"
 #endif
 
+class DictionaryValue;
 struct ViewHostMsg_ScriptedPrint_Params;
 
 namespace printing {
@@ -66,6 +67,13 @@ class PrintingMessageFilter : public BrowserMessageFilter {
       int routing_id,
       IPC::Message* reply_msg);
 
+  void OnUpdatePrintSettings(int document_cookie,
+                             const DictionaryValue& job_settings,
+                             IPC::Message* reply_msg);
+  void OnUpdatePrintSettingsReply(
+      scoped_refptr<printing::PrinterQuery> printer_query,
+      IPC::Message* reply_msg);
+
   printing::PrintJobManager* print_job_manager_;
 
   bool cloud_print_enabled_;