Move fuchsia tests to new mx_object_get_info style

runtime/bin/run_vm_tests_fuchsia.cc

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <fcntl.h>
 #include <launchpad/launchpad.h>
 #include <launchpad/vmo.h>
 #include <magenta/status.h>
 #include <magenta/syscalls.h>
 #include <magenta/syscalls/object.h>
@@ skipping 258 matching lines @@
   RETURN_IF_ERROR(p);
 
   drain_fd(stdout_pipe, test_stdout);
   drain_fd(stderr_pipe, test_stderr);
 
   mx_status_t r =
       mx_handle_wait_one(p, MX_SIGNAL_SIGNALED, MX_TIME_INFINITE, NULL);
   RETURN_IF_ERROR(r);
 
   mx_info_process_t proc_info;
-  mx_size_t info_size;
-  mx_status_t status =
-      mx_object_get_info(p, MX_INFO_PROCESS, sizeof(proc_info.rec), &proc_info,
-                         sizeof(proc_info), &info_size);
+  mx_status_t status = mx_object_get_info(p, MX_INFO_PROCESS, &proc_info,
+                                          sizeof(proc_info), nullptr, nullptr);
   RETURN_IF_ERROR(status);
 
   r = mx_handle_close(p);
   RETURN_IF_ERROR(r);
-  return proc_info.rec.return_code;
+  return proc_info.return_code;
 }
 
 
 static void handle_result(intptr_t result,
                           char* test_stdout,
                           char* test_stderr,
                           const char* test) {
   if (result != 0) {
     if (!isExpectFail(test) && !isBug(test)) {
       printf("**** Test %s FAILED\n\nstdout:\n%s\nstderr:\n%s\n", test,
@@ skipping 151 matching lines @@
   RETURN_IF_ERROR(status);
 
   // Complain if we didn't try to run all of the tests.
   if (test_list_index != lines_count) {
     fprintf(stderr, "Failed to attempt all the tests!\n");
     fflush(0);
     return -1;
   }
   return 0;
 }