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

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 edc0c63e319c76b1cc3e002c809670fdb5f802d3..77a66a6a42ab71da4d1402d9e02320795675815b 100644
--- a/chrome/browser/printing/printer_query.h
+++ b/chrome/browser/printing/printer_query.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -11,6 +11,7 @@
 #include "ui/gfx/native_widget_types.h"
 
 class CancelableTask;
+class DictionaryValue;
 class MessageLoop;
 
 namespace base {
@@ -51,6 +52,14 @@ class PrinterQuery : public PrintJobWorkerOwner {
                    bool use_overlays,
                    CancelableTask* callback);
 
+  // Updates the current settings with |new_settings| dictionary values.
+  void SetSettings(const DictionaryValue& new_settings,
+                   CancelableTask* callback);
+
+  // Lazy create the worker thread. There is one worker thread per print job.
+  // Returns true, if worker thread exists or created.

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

nit: or has been created.

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

Done.

+  bool StartWorker(CancelableTask* callback);

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

This method should be private.

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

Done.

+
   // Stops the worker thread since the client is done with this object.
   void StopWorker();