Switch Dart_Initialize to use a struct

runtime/bin/fuchsia_test.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 <dart_api.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "bin/log.h"
@@ skipping 130 matching lines @@
       internal_library, print_closure_name, print_closure);
   DART_CHECK_VALID(status);
 }
 
 int Main() {
   Log::Print("Calling Dart_SetVMFlags\n");
   if (!Dart_SetVMFlags(0, NULL)) {
     FATAL("Failed to set flags\n");
   }
   Log::Print("Calling Dart_Initialize\n");
-  char* error = Dart_Initialize(
-      vm_isolate_snapshot_buffer, NULL, NULL,
-      NULL, NULL, NULL, NULL,
-      NULL,
-      NULL,
-      NULL,
-      NULL,
-      NULL,
-      NULL,
-      NULL);
+  Dart_InitializeParams init_params;
+  memset(&init_params, 0, sizeof(init_params));
+  init_params.version = DART_INITIALIZE_PARAMS_CURRENT_VERSION;
+  init_params.vm_isolate_snapshot = vm_isolate_snapshot_buffer;
+  char* error = Dart_Initialize(&init_params);
   if (error != NULL) {
     FATAL1("VM initialization failed: %s\n", error);
   }
 
   Log::Print("Creating Isolate\n");
   Dart_Isolate isolate = Dart_CreateIsolate(
       "script_uri",
       "main",
       isolate_snapshot_buffer,
       NULL,
@@ skipping 41 matching lines @@
   Log::Print("Success!\n");
   return 0;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(void) {
   return dart::bin::Main();
 }