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

ppapi/proxy/ppb_image_data_proxy.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_PPB_IMAGE_DATA_PROXY_H_
 #define PPAPI_PPB_IMAGE_DATA_PROXY_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_size.h"
 #include "ppapi/c/pp_var.h"
+#include "ppapi/c/ppb_image_data.h"
 #include "ppapi/proxy/interface_proxy.h"
 #include "ppapi/proxy/serialized_structs.h"
 #include "ppapi/shared_impl/ppb_image_data_shared.h"
 #include "ppapi/shared_impl/resource.h"
 #include "ppapi/thunk/ppb_image_data_api.h"
 
-struct PPB_ImageData;
 class TransportDIB;
 
 namespace skia {
 class PlatformCanvas;
 }
 
 namespace ppapi {
 
 class HostResource;
 
@@ skipping 62 matching lines @@
                        std::string* image_data_desc,
                        ImageHandle* result_image_handle);
 
   DISALLOW_COPY_AND_ASSIGN(PPB_ImageData_Proxy);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PPB_IMAGE_DATA_PROXY_H_