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

chrome/browser/printing/printer_manager_dialog_mac.mm

+// 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.
+
+#include "chrome/browser/printing/printer_manager_dialog.h"
+
+#import <AppKit/AppKit.h>
+
+namespace printing {
+
+static NSString* kPrintAndFaxPrefPane =
+    @"/System/Library/PreferencePanes/PrintAndFax.prefPane";
+
+void PrinterManagerDialog::ShowPrinterManagerDialog() {
+  [[NSWorkspace sharedWorkspace] openFile:kPrintAndFaxPrefPane];
+}
+
+}  // namespace printing