[Chrome] Support NumCopies print preset

chrome/browser/ui/webui/print_preview/print_preview_ui.cc

 // Copyright (c) 2012 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/ui/webui/print_preview/print_preview_ui.h"
 
 #include <map>
 
 #include "base/id_map.h"
 #include "base/lazy_instance.h"
@@ skipping 588 matching lines @@
 }
 
 void PrintPreviewUI::OnReloadPrintersList() {
   web_ui()->CallJavascriptFunction("reloadPrintersList");
 }
 
 void PrintPreviewUI::OnPrintPreviewScalingDisabled() {
   web_ui()->CallJavascriptFunction("printScalingDisabledForSourcePDF");
 }
 
+void PrintPreviewUI::OnPrintPreviewNumCopies(int num_copies) {
+  // FIXME: Call javascript function?

[Nikhil, 2014/07/09 09:36:47]

Is this right approach?

[Vitaly Buka (NO REVIEWS), 2014/07/10 01:13:04]

yes
On 2014/07/09 09:36:47, Nikhil wrote:

+}
+
 // static
 void PrintPreviewUI::SetDelegateForTesting(TestingDelegate* delegate) {
   g_testing_delegate = delegate;
 }