ThreadScope concept to check variable accessed on correct thread

webrtc/base/thread.h

Index: webrtc/base/thread.h
diff --git a/webrtc/base/thread.h b/webrtc/base/thread.h
index 1a0c447264e4284e426b80e9cfd38a3a99503cba..4891bb2cc6d36a6d2ecf83aa5a824bf4cadf2b9b 100644
--- a/webrtc/base/thread.h
+++ b/webrtc/base/thread.h
@@ -20,6 +20,7 @@
 #if defined(WEBRTC_POSIX)
 #include <pthread.h>
 #endif
+#include "webrtc/base/checks.h"
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/base/event.h"
 #include "webrtc/base/messagequeue.h"
@@ -93,7 +94,7 @@ class Runnable {
 
 // WARNING! SUBCLASSES MUST CALL Stop() IN THEIR DESTRUCTORS!  See ~Thread().
 
-class Thread : public MessageQueue {
+class LOCKABLE Thread : public MessageQueue {
  public:
   // Create a new Thread and optionally assign it to the passed SocketServer.
   Thread();