MessageCallbackCount 3756 test/cctest/test-debug.cc   v8::V8::AddMessageListener(MessageCallbackCount);
MessageCallbackCount 3877 test/cctest/test-debug.cc   v8::V8::RemoveMessageListeners(MessageCallbackCount);
MessageCallbackCount 3896 test/cctest/test-debug.cc   v8::V8::AddMessageListener(MessageCallbackCount);