22 static AtExitManager* g_top_manager = NULL;  variable
24 AtExitManager::AtExitManager() : next_manager_(g_top_manager) {  in AtExitManager()
28   DCHECK(!g_top_manager);  in AtExitManager()
30   g_top_manager = this;  in AtExitManager()
34   if (!g_top_manager) {  in ~AtExitManager()
38   DCHECK_EQ(this, g_top_manager);  in ~AtExitManager()
41   g_top_manager = next_manager_;  in ~AtExitManager()
52   if (!g_top_manager) {  in RegisterTask()
57   AutoLock lock(g_top_manager->lock_);  in RegisterTask()
58   g_top_manager->stack_.push(task);  in RegisterTask()
63   if (!g_top_manager) {  in ProcessCallbacksNow()
68   AutoLock lock(g_top_manager->lock_);  in ProcessCallbacksNow()
70   while (!g_top_manager->stack_.empty()) {  in ProcessCallbacksNow()
71     base::Closure task = g_top_manager->stack_.top();  in ProcessCallbacksNow()
73     g_top_manager->stack_.pop();  in ProcessCallbacksNow()
77 AtExitManager::AtExitManager(bool shadow) : next_manager_(g_top_manager) {  in AtExitManager()
78   DCHECK(shadow || !g_top_manager);  in AtExitManager()
79   g_top_manager = this;  in AtExitManager()