Fix gen_snapshot product mode build

runtime/bin/gen_snapshot.cc

 // Copyright (c) 2013, 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 <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 723 matching lines @@
   Dart_Handle result =
       Dart_SetNativeResolver(library, &StubNativeLookup, &StubNativeSymbol);
   DART_CHECK_VALID(result);
 }
 
 
 // Iterate over all libraries and setup the stub native lookup. This must be
 // run after |SetupStubNativeResolversForPrecompilation| because the former
 // loads some libraries.
 static void SetupStubNativeResolvers() {
-  Dart_Handle library_ids = Dart_GetLibraryIds();
-  intptr_t library_ids_length;
-  Dart_ListLength(library_ids, &library_ids_length);
-  for (intptr_t i = 0; i < library_ids_length; i++) {
-    Dart_Handle library_id_handle = Dart_ListGetAt(library_ids, i);
-    DART_CHECK_VALID(library_id_handle);
-    int64_t library_id;
-    Dart_IntegerToInt64(library_id_handle, &library_id);
-    Dart_Handle library = Dart_GetLibraryFromId(library_id);
+  Dart_Handle libraries = Dart_GetLoadedLibraries();
+  intptr_t libraries_length;
+  Dart_ListLength(libraries, &libraries_length);
+  for (intptr_t i = 0; i < libraries_length; i++) {
+    Dart_Handle library = Dart_ListGetAt(libraries, i);
     DART_CHECK_VALID(library);
     Dart_NativeEntryResolver old_resolver = NULL;
     Dart_GetNativeResolver(library, &old_resolver);
     if (old_resolver == NULL) {
       Dart_Handle result =
           Dart_SetNativeResolver(library, &StubNativeLookup, &StubNativeSymbol);
       DART_CHECK_VALID(result);
     }
   }
 }
@@ skipping 606 matching lines @@
   EventHandler::Stop();
   return 0;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(int argc, char** argv) {
   return dart::bin::main(argc, argv);
 }