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

printing/printing_context_mac.mm

 // Copyright (c) 2009 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_mac.h"
 
 #import <ApplicationServices/ApplicationServices.h>
 #import <AppKit/AppKit.h>
 
 #include "base/logging.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/sys_string_conversions.h"
 #include "printing/print_settings_initializer_mac.h"
 
 namespace printing {
 
 // static
-PrintingContext* PrintingContext::Create() {
-  return static_cast<PrintingContext*>(new PrintingContextMac);
+PrintingContext* PrintingContext::Create(const std::string& app_locale) {
+  return static_cast<PrintingContext*>(new PrintingContextMac(app_locale));
 }
 
-PrintingContextMac::PrintingContextMac()
-    : PrintingContext(),
+PrintingContextMac::PrintingContextMac(const std::string& app_locale)
+    : PrintingContext(app_locale),
       print_info_(NULL),
       context_(NULL) {
 }
 
 PrintingContextMac::~PrintingContextMac() {
   ReleaseContext();
 }
 
 void PrintingContextMac::AskUserForSettings(gfx::NativeView parent_view,
                                             int max_pages,
@@ skipping 177 matching lines @@
     print_info_ = nil;
     context_ = NULL;
   }
 }
 
 gfx::NativeDrawingContext PrintingContextMac::context() const {
   return context_;
 }
 
 }  // namespace printing