On Chrome OS, use the application locale to determine the default paper size ...

printing/printing_context.cc

 // Copyright (c) 2010 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 "printing/printing_context.h"
 
 namespace printing {
 
-PrintingContext::PrintingContext()
+PrintingContext::PrintingContext(const std::string& app_locale)
     : dialog_box_dismissed_(false),
       in_print_job_(false),
-      abort_printing_(false) {
+      abort_printing_(false),
+      app_locale_(app_locale) {
 }
 
 PrintingContext::~PrintingContext() {
 }
 
 void PrintingContext::ResetSettings() {
   ReleaseContext();
 
   settings_.Clear();
 
   in_print_job_ = false;
   dialog_box_dismissed_ = false;
   abort_printing_ = false;
 }
 
 PrintingContext::Result PrintingContext::OnError() {
   ResetSettings();
   return abort_printing_ ? CANCEL : FAILED;
 }
 
 }  // namespace printing