[Chrome] Support NumCopies print preset

ppapi/api/dev/pp_print_settings_dev.idl

 /* 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.
  */
 
 /**
  * This file defines the struct for PrintSettings.
  */
 
 [assert_size(4)]
@@ skipping 12 matching lines @@
   PP_PRINTOUTPUTFORMAT_EMF        = 1u << 3
 };
 
 [assert_size(4)]
 enum PP_PrintScalingOption_Dev {
   PP_PRINTSCALINGOPTION_NONE = 0,
   PP_PRINTSCALINGOPTION_FIT_TO_PRINTABLE_AREA = 1,
   PP_PRINTSCALINGOPTION_SOURCE_SIZE = 2
 };
 
+[assert_size(4)]
+enum PP_PrintDuplexMode_Dev {
+  PP_PRINTDUPLEXMODE_NONE       = 0,
+  PP_PRINTDUPLEXMODE_SIMPLEX    = 1,
+  PP_PRINTDUPLEXMODE_LONG_EDGE  = 2,
+  PP_PRINTDUPLEXMODE_SHORT_EDGE = 3
+};
+
 [assert_size(60)]
 struct PP_PrintSettings_Dev {
   /** This is the size of the printable area in points (1/72 of an inch). */
   PP_Rect printable_area;
   PP_Rect content_area;
   PP_Size paper_size;
   int32_t dpi;
   PP_PrintOrientation_Dev orientation;
   PP_PrintScalingOption_Dev print_scaling_option;
   PP_Bool grayscale;
   /** Note that Chrome currently only supports PDF printing. */
   PP_PrintOutputFormat_Dev format;
 };
+
+[assert_size(8)]
+struct PP_PrintRange_Dev {
+  int32_t from;
+  int32_t to;
+};