Add ability to retrieve a thread_name given a thread_id.

base/threading/thread.cc

Index: base/threading/thread.cc
diff --git a/base/threading/thread.cc b/base/threading/thread.cc
index f4ba3ff80aba57ddf85e949bb5a204817cf2fced..9487c83d1b515b9c4d2c8549e9b913cc714c2a5b 100644
--- a/base/threading/thread.cc
+++ b/base/threading/thread.cc
@@ -7,6 +7,7 @@
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
+#include "base/threading/thread_id_name_manager.h"
 #include "base/threading/thread_local.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/synchronization/waitable_event.h"
@@ -65,6 +66,7 @@ Thread::Thread(const char* name)
 
 Thread::~Thread() {
   Stop();
+  ThreadIdNameManager::GetInstance()->RemoveNameForId(thread_id_);
 }
 
 bool Thread::Start() {