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

content/browser/renderer_host/render_message_filter.h

Index: content/browser/renderer_host/render_message_filter.h
diff --git a/content/browser/renderer_host/render_message_filter.h b/content/browser/renderer_host/render_message_filter.h
index b8214665dec3984664ea9bb7800264d51cc6481f..4e198e6969d2805c8d203a9d00dd6f72a6a4a7c2 100644
--- a/content/browser/renderer_host/render_message_filter.h
+++ b/content/browser/renderer_host/render_message_filter.h
@@ -60,6 +60,7 @@ class PrintJobManager;
 }
 
 struct ViewHostMsg_ScriptedPrint_Params;
+struct ViewMsg_Print_Params;
 
 // This class filters out incoming IPC messages for the renderer process on the
 // IPC thread.
@@ -272,6 +273,18 @@ class RenderMessageFilter : public BrowserMessageFilter,
       scoped_refptr<printing::PrinterQuery> printer_query,
       IPC::Message* reply_msg);
 
+  // Get the current print settings right here synchronously.
+  void OnGetCurrentPrintSettings(int document_cookie,
+                                 ViewMsg_Print_Params* params);
+
+  // Update current print settings with new |job_settings|.
+  void OnUpdatePrintSettings(int document_cookie,
+                             const std::string& job_settings,
+                             IPC::Message* reply_msg);
+  void OnUpdatePrintSettingsReply(
+      scoped_refptr<printing::PrinterQuery> printer_query,
+      IPC::Message* reply_msg);
+
   // A javascript code requested to print the current page. The renderer host
   // have to show to the user the print dialog and returns the selected print
   // settings.