Pepper: Fix the definition of |PPB_AudioInput_Callback|.

ppapi/c/dev/ppb_audio_input_dev.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.
  */
 
-/* From dev/ppb_audio_input_dev.idl modified Mon Nov 14 17:58:16 2011. */
+/* From dev/ppb_audio_input_dev.idl modified Wed Nov 23 09:26:09 2011. */
 
 #ifndef PPAPI_C_DEV_PPB_AUDIO_INPUT_DEV_H_
 #define PPAPI_C_DEV_PPB_AUDIO_INPUT_DEV_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
 
 #define PPB_AUDIO_INPUT_DEV_INTERFACE_0_1 "PPB_AudioInput(Dev);0.1"
 #define PPB_AUDIO_INPUT_DEV_INTERFACE PPB_AUDIO_INPUT_DEV_INTERFACE_0_1
 
 /**
  * @file
  * This file defines the <code>PPB_AudioInput_Dev</code> interface, which
  * provides realtime audio input capture.
  */
 
 
 /**
  * @addtogroup Typedefs
  * @{
  */
 /**
  * <code>PPB_AudioInput_Callback</code> defines the type of an audio callback
  * function used to provide the audio buffer with data. This callback will be
- * called on a separate thread to the creation thread.
+ * called on a separate thread from the creation thread.
  */
-typedef void (*PPB_AudioInput_Callback)(void* sample_buffer,
+typedef void (*PPB_AudioInput_Callback)(const void* sample_buffer,
                                         uint32_t buffer_size_in_bytes,
                                         void* user_data);
 /**
  * @}
  */
 
 /**
  * @addtogroup Interfaces
  * @{
  */
@@ skipping 56 matching lines @@
    * call completes.
    */
   PP_Bool (*StopCapture)(PP_Resource audio_input);
 };
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_DEV_PPB_AUDIO_INPUT_DEV_H_ */