Restructure the structs/unions involved in SRPC argument passing. This will...

tests/native_worker/native_worker.c

 /*
  * Copyright 2008 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can
  * be found in the LICENSE file.
  */
 
 /*
  * Simple test for native web workers.
  */
 
@@ skipping 22 matching lines @@
 static char* message_string;
 
 void PostMessage(NaClSrpcRpc *rpc,
                  NaClSrpcArg **in_args,
                  NaClSrpcArg **out_args,
                  NaClSrpcClosure *done) {
   rpc->result = NACL_SRPC_RESULT_APP_ERROR;
   /*
    * Strdup must be used because the SRPC layer frees the string passed to it.
    */
-  message_string = strdup(in_args[0]->u.sval.str);
+  message_string = strdup(in_args[0]->arrays.str);
   /*
    * Echo the message back to the renderer.
    */
   if (-1 != worker_upcall_desc) {
     NaClSrpcChannel upcall_channel;
     if (!NaClSrpcClientCtor(&upcall_channel, worker_upcall_desc)) {
       done->Run(done);
       return;
     }
     NaClSrpcInvokeBySignature(&upcall_channel, "postMessage:s:", "from nacl");
@@ skipping 12 matching lines @@
 int main() {
   if (!NaClSrpcModuleInit()) {
     return 1;
   }
   if (!NaClSrpcAcceptClientConnection(srpc_methods)) {
     return 1;
   }
   NaClSrpcModuleFini();
   return 0;
 }