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..79d1a0337bc53141bf8261f5bee1c744fc1ae430 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.
 
@@ -51,6 +51,11 @@ class PrinterQuery : public PrintJobWorkerOwner {
                    bool use_overlays,
                    CancelableTask* callback);
 
+  // Updates the current settings with |new_settings|. |new_settings| is a json
+  // string.
+  void SetSettings(const std::string& new_settings,
+                   CancelableTask* callback);
+
   // Stops the worker thread since the client is done with this object.
   void StopWorker();