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

ppapi/thunk/ppb_broker_thunk.cc

Index: ppapi/thunk/ppb_broker_thunk.cc
diff --git a/ppapi/thunk/ppb_broker_thunk.cc b/ppapi/thunk/ppb_broker_thunk.cc
index c6c1cd10969353a9903ce422ef37493dad7c4f94..3f243de2537dedb56d6dc83820c68afd044882d6 100644
--- a/ppapi/thunk/ppb_broker_thunk.cc
+++ b/ppapi/thunk/ppb_broker_thunk.cc
@@ -52,7 +52,7 @@ const PPB_BrokerTrusted g_ppb_broker_thunk = {
 
 }  // namespace
 
-const PPB_BrokerTrusted* GetPPB_BrokerTrusted_Thunk() {
+const PPB_BrokerTrusted_0_2* GetPPB_BrokerTrusted_0_2_Thunk() {
   return &g_ppb_broker_thunk;
 }