Introduce Dart_SetVMFlags API function.

runtime/bin/gen_snapshot.cc

 // Copyright (c) 2011, 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.
 
 // Generate a snapshot file after loading all the scripts specified on the
 // command line.
 
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
@@ skipping 236 matching lines @@
                      &script_name) < 0) {
     PrintUsage();
     return 255;
   }
 
   if (snapshot_filename == NULL) {
     fprintf(stderr, "No snapshot output file specified\n");
     return 255;
   }
 
-  // Initialize the Dart VM (TODO(asiva) - remove const_cast once
-  // dart API is fixed to take a const char** in Dart_Initialize).
-  Dart_Initialize(vm_options.count(),
-                  vm_options.arguments(),
-                  SnapshotCreateCallback);
+  Dart_SetVMFlags(vm_options.count(), vm_options.arguments());
+  Dart_Initialize(SnapshotCreateCallback);
 
   // Create an isolate. As a side effect, SnapshotCreateCallback
   // gets called, which loads the script (if one is specified), its libraries
   // and writes out a snapshot.
   Dart_Isolate isolate = Dart_CreateIsolate(NULL, script_name);
   if (isolate == NULL) {
     return 255;
   }
 
   // Shutdown the isolate.
   Dart_ShutdownIsolate();
   return 0;
 }