Rename PPB_Flash_DeviceID interface 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_DeviceID</code> interface.
+ * This file contains the <code>PPB_Flash_DRM</code> interface.
  */
 
 [generate_thunk]
 
 label Chrome {
-  M21 = 1.0
+  M29 = 1.0
 };
 
-interface PPB_Flash_DeviceID {
+/**
+ * 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.
+   */
   PP_Resource Create([in] PP_Instance instance);
 
   /**
    * Asynchronously computes the device ID. When available, it will place the
    * string in |*id| and will call the completion callback. On failure the
    * given var will be PP_VARTYPE_UNDEFINED.
    */
-  int32_t GetDeviceID([in] PP_Resource device_id,
+  int32_t GetDeviceID([in] PP_Resource drm,
                       [out] PP_Var id,
                       [in] PP_CompletionCallback callback);
 };