Update PPAPI IDL generator to define versioned structs, and unversioned typedef.

ppapi/c/dev/ppb_audio_input_dev.h

Index: ppapi/c/dev/ppb_audio_input_dev.h
diff --git a/ppapi/c/dev/ppb_audio_input_dev.h b/ppapi/c/dev/ppb_audio_input_dev.h
index 73d9bc5b3bfe0c64174416cf9bac94ea75c9d13e..9dc7f64de89c8f8e2a7c65ead8ef2fb09771e9f0 100644
--- a/ppapi/c/dev/ppb_audio_input_dev.h
+++ b/ppapi/c/dev/ppb_audio_input_dev.h
@@ -3,7 +3,7 @@
  * found in the LICENSE file.
  */
 
-/* From dev/ppb_audio_input_dev.idl modified Wed Nov 23 09:26:09 2011. */
+/* From dev/ppb_audio_input_dev.idl modified Mon Nov 28 22:30:37 2011. */
 
 #ifndef PPAPI_C_DEV_PPB_AUDIO_INPUT_DEV_H_
 #define PPAPI_C_DEV_PPB_AUDIO_INPUT_DEV_H_
@@ -48,7 +48,7 @@ typedef void (*PPB_AudioInput_Callback)(const void* sample_buffer,
  * The <code>PPB_AudioInput_Dev</code> interface contains pointers to several
  * functions for handling audio input resources.
  */
-struct PPB_AudioInput_Dev {
+struct PPB_AudioInput_Dev_0_1 {
   /**
    * Create is a pointer to a function that creates an audio input resource.
    * No sound will be captured until StartCapture() is called.
@@ -104,6 +104,8 @@ struct PPB_AudioInput_Dev {
    */
   PP_Bool (*StopCapture)(PP_Resource audio_input);
 };
+
+typedef struct PPB_AudioInput_Dev_0_1 PPB_AudioInput_Dev;
 /**
  * @}
  */