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

printing/printing_context.h

 // 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.
 
 #ifndef PRINTING_PRINTING_CONTEXT_H_
 #define PRINTING_PRINTING_CONTEXT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 66 matching lines @@
 
   // Releases the native printing context.
   virtual void ReleaseContext() = 0;
 
   // Returns the native context used to print.
   virtual gfx::NativeDrawingContext context() const = 0;
 
   // Creates an instance of this object. Implementers of this interface should
   // implement this method to create an object of their implementation. The
   // caller owns the returned object.
-  static PrintingContext* Create();
+  static PrintingContext* Create(const std::string& app_locale);
 
   void set_use_overlays(bool use_overlays) {
     settings_.use_overlays = use_overlays;
   }
 
   const PrintSettings& settings() const {
     return settings_;
   }
 
  protected:
-  PrintingContext();
+  explicit PrintingContext(const std::string& app_locale);
 
   // Reinitializes the settings for object reuse.
   void ResetSettings();
 
   // Does bookkeeping when an error occurs.
   PrintingContext::Result OnError();
 
   // Complete print context settings.
   PrintSettings settings_;
 
   // The dialog box has been dismissed.
   volatile bool dialog_box_dismissed_;
 
   // Is a print job being done.
   volatile bool in_print_job_;
 
   // Did the user cancel the print job.
   volatile bool abort_printing_;
 
+  // The application locale.
+  std::string app_locale_;
+
   DISALLOW_COPY_AND_ASSIGN(PrintingContext);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINTING_CONTEXT_H_