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

ppapi/c/ppb_graphics_3d.h

 /* 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.
  */
 #ifndef PPAPI_C_PPB_GRAPHICS_3D_H_
 #define PPAPI_C_PPB_GRAPHICS_3D_H_
 
 #include "ppapi/c/pp_graphics_3d.h"
 
 #include "ppapi/c/pp_bool.h"
@@ skipping 14 matching lines @@
  * gles2->Clear(context, GL_COLOR_BUFFER);
  * g3d->SwapBuffers(context);
  *
  * // Shutdown.
  * core->ReleaseResource(context);
  */
 
 #define PPB_GRAPHICS_3D_INTERFACE_1_0 "PPB_Graphics3D;1.0"
 #define PPB_GRAPHICS_3D_INTERFACE PPB_GRAPHICS_3D_INTERFACE_1_0
 
-struct PPB_Graphics3D {
+struct PPB_Graphics3D_1_0 {
   /**
    * Retrieves the maximum supported value for the given attribute.
    *
    * This function may be used to check if a particular attribute value is
    * supported before attempting to create a context.
    * Attributes that can be queried for include:
    * - PP_GRAPHICS3DATTRIB_ALPHA_SIZE
    * - PP_GRAPHICS3DATTRIB_BLUE_SIZE
    * - PP_GRAPHICS3DATTRIB_GREEN_SIZE
    * - PP_GRAPHICS3DATTRIB_RED_SIZE
@@ skipping 165 matching lines @@
    * Note that the same error code may also be obtained by calling GetError.
    *
    * On failure SwapBuffers may return the following error codes:
    * - PP_ERROR_BADRESOURCE if context is invalid.
    * - PP_ERROR_BADARGUMENT if callback is invalid.
    */
   int32_t (*SwapBuffers)(PP_Resource context,
                          struct PP_CompletionCallback callback);
 };
 
+typedef struct PPB_Graphics3D_1_0 PPB_Graphics3D;
+
 #endif  /* PPAPI_C_PPB_GRAPHICS_3D_H_ */