Fixed tsan warnings in remoting_unittests

remoting/jingle_glue/jingle_thread.cc

Index: remoting/jingle_glue/jingle_thread.cc
diff --git a/remoting/jingle_glue/jingle_thread.cc b/remoting/jingle_glue/jingle_thread.cc
index 00370668acb38e22b7ff689f2ab12b4601beaf7f..f13477ec73901d97cb0ec8509ad647b266f7d325 100644
--- a/remoting/jingle_glue/jingle_thread.cc
+++ b/remoting/jingle_glue/jingle_thread.cc
@@ -92,6 +92,9 @@ void JingleThread::Stop() {
   // queue before exiting. Thread::Stop() would not do that.
   Post(this, kStopMessageId);
   stopped_event_.Wait();
+
+  // This will wait until the thread is actually finished.
+  Thread::Stop();
 }
 
 MessageLoop* JingleThread::message_loop() {