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

ppapi/thunk/ppb_mouse_lock_thunk.cc

Index: ppapi/thunk/ppb_mouse_lock_thunk.cc
diff --git a/ppapi/thunk/ppb_mouse_lock_thunk.cc b/ppapi/thunk/ppb_mouse_lock_thunk.cc
index a26e789ae83f4bd6ea911bab4f4aefae296c87bf..8871f8aa9e9a8ec952bee81f9b55c72c3a3b6f01 100644
--- a/ppapi/thunk/ppb_mouse_lock_thunk.cc
+++ b/ppapi/thunk/ppb_mouse_lock_thunk.cc
@@ -36,7 +36,7 @@ const PPB_MouseLock g_ppb_mouse_lock_thunk = {
 
 }  // namespace
 
-const PPB_MouseLock* GetPPB_MouseLock_Thunk() {
+const PPB_MouseLock_1_0* GetPPB_MouseLock_1_0_Thunk() {
   return &g_ppb_mouse_lock_thunk;
 }