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 6a41742a37bbbeb1f0f5dded77f5557d166e8027..809ba830ac027d117d57e6126f2d2720d3fc0219 100644
--- a/chrome/browser/printing/printing_message_filter.h
+++ b/chrome/browser/printing/printing_message_filter.h
@@ -12,7 +12,9 @@
 #include "base/shared_memory.h"
 #endif
 
+class DictionaryValue;
 struct ViewHostMsg_ScriptedPrint_Params;
+struct ViewMsg_Print_Params;
 
 namespace printing {
 class PrinterQuery;
@@ -66,6 +68,18 @@ class PrintingMessageFilter : public BrowserMessageFilter {
       int routing_id,
       IPC::Message* reply_msg);
 
+  // Get the current print settings right here synchronously.

[jam, 2011/03/02 18:25:53]

nit: here and below, no need to comment IPC dispatcher functions.  the messages
are documented already.

[kmadhusu, 2011/03/04 19:39:02]

Done.

+  void OnGetCurrentPrintSettings(int document_cookie,

[Lei Zhang, 2011/03/03 00:22:44]

You don't need |document_cookie| here or below since ViewMsg_Print_Params
already has a document_cookie field.

[kmadhusu, 2011/03/04 19:39:02]

Removed this message handler.

+                                 ViewMsg_Print_Params* params);
+
+  // Update current print settings with new |job_settings|.
+  void OnUpdatePrintSettings(int document_cookie,

[kmadhusu, 2011/03/04 19:39:02]

I need document_cookie here.

+                             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_;