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

ppapi/thunk/ppb_video_capture_thunk.cc

Index: ppapi/thunk/ppb_video_capture_thunk.cc
diff --git a/ppapi/thunk/ppb_video_capture_thunk.cc b/ppapi/thunk/ppb_video_capture_thunk.cc
index f8704d0de231142cd2c2aef25ece6b9dc24ca276..36844ece640ccfdc792944f3411df0cb16b0eccd 100644
--- a/ppapi/thunk/ppb_video_capture_thunk.cc
+++ b/ppapi/thunk/ppb_video_capture_thunk.cc
@@ -65,7 +65,7 @@ const PPB_VideoCapture_Dev g_ppb_videocapture_thunk = {
 
 }  // namespace
 
-const PPB_VideoCapture_Dev* GetPPB_VideoCapture_Dev_Thunk() {
+const PPB_VideoCapture_Dev_0_1* GetPPB_VideoCapture_Dev_0_1_Thunk() {
   return &g_ppb_videocapture_thunk;
 }