PrintPreview:[MAC & WIN] Added code to show the native printer management dialog.

chrome/browser/printing/printer_manager_dialog.h

+// 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.
+
+#ifndef CHROME_BROWSER_PRINTING_PRINTER_MANAGER_DIALOG_H_
+#define CHROME_BROWSER_PRINTING_PRINTER_MANAGER_DIALOG_H_
+
+#include "base/basictypes.h"
+
+namespace printing {
+
+// An abstraction of a printer manager dialog. This is used for print preview.
+// This includes the OS-dependent UI to manage the network and local printers.
+class PrinterManagerDialog {
+ public:
+  // Displays the native printer manager dialog.
+  static void ShowPrinterManagerDialog();
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(PrinterManagerDialog);
+};
+
+}  // namespace printing
+
+#endif  // CHROME_BROWSER_PRINTING_PRINTER_MANAGER_DIALOG_H_