Avoid some crashes when running without snapshots.

test/cctest/test-api.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 9846 matching lines @@
                                       "})();");
     CHECK_EQ(42, script->Run()->Int32Value());
   }
 }
 
 
 static int GetGlobalObjectsCount() {
   i::Isolate::Current()->heap()->EnsureHeapIsIterable();
   int count = 0;
   i::HeapIterator it;
-  for (i::HeapObject* object = it.Next(); object != NULL; object = it.Next())
+  for (i::HeapObject* object = it.next(); object != NULL; object = it.next())
     if (object->IsJSGlobalObject()) count++;
   return count;
 }
 
 
 static void CheckSurvivingGlobalObjectsCount(int expected) {
   // We need to collect all garbage twice to be sure that everything
   // has been collected.  This is because inline caches are cleared in
   // the first garbage collection but some of the maps have already
   // been marked at that point.  Therefore some of the maps are not
@@ skipping 4954 matching lines @@
   }
 
   i::Isolate::Current()->heap()->CollectAllGarbage(true);
   { i::Object* raw_map_cache = i::Isolate::Current()->context()->map_cache();
     if (raw_map_cache != i::Isolate::Current()->heap()->undefined_value()) {
       i::MapCache* map_cache = i::MapCache::cast(raw_map_cache);
       CHECK_GT(elements, map_cache->NumberOfElements());
     }
   }
 }