Fix up some types in the API.

ppapi/c/ppb_audio.h

 /* Copyright (c) 2011 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.
  */
 #ifndef PPAPI_C_PPB_AUDIO_H_
 #define PPAPI_C_PPB_AUDIO_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
 
-#define PPB_AUDIO_INTERFACE "PPB_Audio;0.5"
+#define PPB_AUDIO_INTERFACE "PPB_Audio;0.6"
 
 /**
  * @file
  * This file defines the PPB_Audio interface for handling audio resources on
  * the browser. Refer to the
  * <a href="/chrome/nativeclient/docs/audio.html">Pepper Audio API Code
  * Walkthrough</a> for information on using this interface.
  */
 
 /**
  * @addtogroup Typedefs
  * @{
  */
 
 /**
  * PPB_Audio_Callback defines the type of an audio callback function used to
  * fill the audio buffer with data.
  */
 typedef void (*PPB_Audio_Callback)(void* sample_buffer,
-                                   size_t buffer_size_in_bytes,
+                                   uint32_t buffer_size_in_bytes,
                                    void* user_data);
 /**
  * @}
  */
 
 /**
  * @addtogroup Interfaces
  * @{
  */
 /**
  * The PPB_Audio interface contains pointers to several functions for handling
  * audio resources on the browser. This interface is a callback-based audio
  * interface. Users of audio must set the callback that will be called each time
  * that the buffer needs to be filled.
  *
  * A C++ example:
  *
  * void audio_callback(void* sample_buffer,
- *                     size_t buffer_size_in_bytes,
- *                      void* user_data) {
+ *                     uint32_t buffer_size_in_bytes,
+ *                     void* user_data) {
  *   ... fill in the buffer with samples ...
  *  }
  *
  * uint32_t obtained;
  * AudioConfig config(PP_AUDIOSAMPLERATE_44100, 4096, &obtained);
  * Audio audio(config, audio_callback, NULL);
  * audio.StartPlayback();
  */
 struct PPB_Audio {
  /**
@@ skipping 59 matching lines @@
    * callback completes.
    */
   PP_Bool (*StopPlayback)(PP_Resource audio);
 };
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_PPB_DEVICE_CONTEXT_AUDIO_H_ */