Pepper: Add MonitorIsExternal function to PPB_Flash_DRM.

ppapi/api/private/ppb_flash_drm.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 contains the <code>PPB_Flash_DRM</code> interface.
  */
 
 [generate_thunk]
 
 label Chrome {
-  M29 = 1.0
+  M29 = 1.0,
+  M33 = 1.1
 };
 
 /**
  * A resource for performing Flash DRM-related operations.
  */
 interface PPB_Flash_DRM {
   /**
    * Creates a PPB_Flash_DRM resource for performing DRM-related operations in
    * Flash.
    */
@@ skipping 17 matching lines @@
                       [out] int64_t hmonitor);
 
   /**
    * Asynchronously returns a PPB_FileRef resource in |file_ref| which points to
    * the Voucher file for performing DRM verification. |callback| will be called
    * upon completion.
    */
    int32_t GetVoucherFile([in] PP_Resource drm,
                           [out] PP_Resource file_ref,
                           [in] PP_CompletionCallback callback);
+
+  /**
+   * Asynchronously returns a value indicating whether the monitor on which the
+   * plugin instance is displayed is external. |callback| will be called upon
+   * completion.
+   */
+   [version=1.1]
+   int32_t MonitorIsExternal([in] PP_Resource drm,
+                             [out] PP_Bool is_external,
+                             [in] PP_CompletionCallback callback);
 };