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

ppapi/thunk/ppb_graphics_2d_thunk.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_graphics_2d.h"
 #include "ppapi/thunk/common.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_graphics_2d_api.h"
@@ skipping 72 matching lines @@
   &IsGraphics2D,
   &Describe,
   &PaintImageData,
   &Scroll,
   &ReplaceContents,
   &Flush
 };
 
 }  // namespace
 
-const PPB_Graphics2D* GetPPB_Graphics2D_Thunk() {
+const PPB_Graphics2D_1_0* GetPPB_Graphics2D_1_0_Thunk() {
   return &g_ppb_graphics_2d_thunk;
 }
 
 }  // namespace thunk
 }  // namespace ppapi