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

ppapi/c/trusted/ppb_audio_trusted.h

Index: ppapi/c/trusted/ppb_audio_trusted.h
diff --git a/ppapi/c/trusted/ppb_audio_trusted.h b/ppapi/c/trusted/ppb_audio_trusted.h
index 152a850ec8ae1ef77775fbfc6f683ccc3b37ee44..975e9c25432bb59177ad978d4caf7a0c2b90e01c 100644
--- a/ppapi/c/trusted/ppb_audio_trusted.h
+++ b/ppapi/c/trusted/ppb_audio_trusted.h
@@ -3,7 +3,7 @@
  * found in the LICENSE file.
  */
 
-/* From trusted/ppb_audio_trusted.idl modified Sat Jul 16 16:51:03 2011. */
+/* From trusted/ppb_audio_trusted.idl modified Wed Oct  5 14:06:02 2011. */
 
 #ifndef PPAPI_C_TRUSTED_PPB_AUDIO_TRUSTED_H_
 #define PPAPI_C_TRUSTED_PPB_AUDIO_TRUSTED_H_
@@ -33,7 +33,7 @@
  * resource returned is an Audio resource; most of the PPB_Audio
  * interface is also usable on this resource.
  */
-struct PPB_AudioTrusted {
+struct PPB_AudioTrusted_0_6 {
   /** Returns an audio resource. */
   PP_Resource (*CreateTrusted)(PP_Instance instance);
   /**
@@ -59,6 +59,8 @@ struct PPB_AudioTrusted {
                              int* shm_handle,
                              uint32_t* shm_size);
 };
+
+typedef struct PPB_AudioTrusted_0_6 PPB_AudioTrusted;
 /**
  * @}
  */