Fixed the caching of counters. This also fixes the --dump-counters which read...

src/d8.cc

 // Copyright 2008 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 239 matching lines @@
 
 
 int* Shell::LookupCounter(const char* name) {
   CounterMap::iterator item = counter_map_.find(name);
   if (item != counter_map_.end()) {
     Counter* result = (*item).second;
     return result->ptr();
   }
   Counter* result = counters_->GetNextCounter();
   if (result == NULL) return NULL;
+  counter_map_[name] = result;
   return result->Bind(name);
 }
 
 
 void Shell::Initialize() {
   // Set up counters
   if (i::FLAG_map_counters != NULL)
     MapCounters(i::FLAG_map_counters);
   if (i::FLAG_dump_counters)
     V8::SetCounterFunction(LookupCounter);
@@ skipping 150 matching lines @@
   return 0;
 }
 
 
 }  // namespace v8
 
 
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }