int cef_thread_refcount = 0; // Under <cef_mutex>.
bool cef_initialized = false; // Under <cef_mutex>.
std::condition_variable cef_initialized_cond;
int cef_thread_refcount = 0; // Under <cef_mutex>.
bool cef_initialized = false; // Under <cef_mutex>.
std::condition_variable cef_initialized_cond;