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

ppapi/thunk/ppb_audio_trusted_thunk.cc

Index: ppapi/thunk/ppb_audio_trusted_thunk.cc
diff --git a/ppapi/thunk/ppb_audio_trusted_thunk.cc b/ppapi/thunk/ppb_audio_trusted_thunk.cc
index 97f89788036e7c90d9dab0b5528cb017baa66ca7..33f1c26cae1696478851d08c299a7d4bc0bc58a9 100644
--- a/ppapi/thunk/ppb_audio_trusted_thunk.cc
+++ b/ppapi/thunk/ppb_audio_trusted_thunk.cc
@@ -59,7 +59,7 @@ const PPB_AudioTrusted g_ppb_audio_trusted_thunk = {
 
 }  // namespace
 
-const PPB_AudioTrusted* GetPPB_AudioTrusted_Thunk() {
+const PPB_AudioTrusted_0_6* GetPPB_AudioTrusted_0_6_Thunk() {
   return &g_ppb_audio_trusted_thunk;
 }