Add a new parameter |latency| to PPB_Audio.

ppapi/api/ppb_audio.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 <code>PPB_Audio</code> interface, which provides
  * realtime stereo audio streaming capabilities.
  */
 
-[generate_thunk]
-
 label Chrome {
-  M14 = 1.0
+  M14 = 1.0,
+  M31 = 1.1
 };
 
 /**
  * <code>PPB_Audio_Callback</code> defines the type of an audio callback
  * function used to fill the audio buffer with data. Please see the
  * Create() function in the <code>PPB_Audio</code> interface for
  * more details on this callback.
+ *
+ * @param[in] sample_buffer A buffer to fill with audio data.
+ * @param[in] buffer_size_in_bytes The size of the buffer in bytes.
+ * @param[in] latency How long before the audio data is to be presented.
+ * @param[inout] user_data An opaque pointer that was passed into
+ * <code>PPB_Audio.Create()</code>.
  */
 typedef void PPB_Audio_Callback([out] mem_t sample_buffer,
                                 [in] uint32_t buffer_size_in_bytes,
+                                [in, version=1.1] PP_TimeDelta latency,
                                 [inout] mem_t user_data);
 
 /**
  * The <code>PPB_Audio</code> interface contains pointers to several functions
  * for handling audio resources. Refer to the
  * <a href="/native-client/{{pepperversion}}/devguide/coding/audio">Audio</a>
  * chapter in the Developer's Guide for information on using this interface.
  * Please see descriptions for each <code>PPB_Audio</code> and
  * <code>PPB_AudioConfig</code> function for more details. A C example using
  * <code>PPB_Audio</code> and <code>PPB_AudioConfig</code> follows.
@@ skipping 103 matching lines @@
    * @return A <code>PP_Bool</code> containing <code>PP_TRUE</code> if
    * successful, otherwise <code>PP_FALSE</code>. Also returns
    * <code>PP_TRUE</code> (and is a no-op) if called while playback is already
    * stopped. If a callback is in progress, StopPlayback() will block until the
    * callback completes.
    */
   PP_Bool StopPlayback(
       [in] PP_Resource audio);
 };