Add a printing resource (as a new style resource) to fetch the default print settings

ppapi/api/dev/ppb_printing_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.
  */
 
 /**
  * Definition of the PPB_Printing interface.
  */
 
 // Note: This version should always match the PPP_Printing_Dev interface.
 label Chrome {
-  M21 = 0.6
+  M21 = 0.6,
+  M23 = 0.7
 };
 
 interface PPB_Printing_Dev {
+  [version=0.6]
+  PP_Bool GetDefaultPrintSettings([in] PP_Instance instance,
+                                  [out] PP_PrintSettings_Dev print_settings);
+
+  /** Create a resource for accessing printing functionality.
+   *
+   * @param[in] instance A <code>PP_Instance</code> identifying one instance
+   * of a module.
+   *
+   * @return A <code>PP_Resource</code> containing the printing resource if
+   * successful or 0 if it could not be created.
+   */
+  [version=0.7]
+  PP_Resource Create([in] PP_Instance instance);
+
   /**
    * Outputs the default print settings for the default printer into
-   * <code>print_settings</code>. Returns <code>PP_FALSE</code> on error.
+   * <code>print_settings</code>. The callback is called with
+   * <code>PP_OK</code> when the settings have been retrieved successfully.
+   *
+   * @param[in] resource The printing resource.
+   *
+   * @param[in] callback A <code>CompletionCallback</code> to be called when
+   * <code>print_settings</code> have been retrieved.
+   *
+   * @return PP_OK_COMPLETIONPENDING if request for the default print settings
+   * was successful, another error code from pp_errors.h on failure.
    */
-  PP_Bool GetDefaultPrintSettings([in] PP_Instance instance,
-                                  [out] PP_PrintSettings_Dev print_settings);
+  [version=0.7]
+  int32_t GetDefaultPrintSettings([in] PP_Resource resource,
+                                  [out] PP_PrintSettings_Dev print_settings,
+                                  [in] PP_CompletionCallback callback);
+
 };