Deprecate NonThreadSafe in remoting in favor of SequenceChecker.

remoting/host/signaling_connector.h

Index: remoting/host/signaling_connector.h
diff --git a/remoting/host/signaling_connector.h b/remoting/host/signaling_connector.h
index 7f5e8a06805499208f0752fdc1de915d943b623f..b057438efb7f39e7e767b529d40b6fa83b369d1a 100644
--- a/remoting/host/signaling_connector.h
+++ b/remoting/host/signaling_connector.h
@@ -7,7 +7,7 @@
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "base/timer/timer.h"
 #include "net/base/network_change_notifier.h"
 #include "remoting/base/oauth_token_getter.h"
@@ -25,7 +25,6 @@ class DnsBlackholeChecker;
 // whenever connection type changes or IP address changes.
 class SignalingConnector
     : public base::SupportsWeakPtr<SignalingConnector>,
-      public base::NonThreadSafe,
       public SignalStrategy::Listener,
       public net::NetworkChangeNotifier::ConnectionTypeObserver,
       public net::NetworkChangeNotifier::IPAddressObserver {
@@ -71,6 +70,8 @@ class SignalingConnector
 
   base::OneShotTimer timer_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(SignalingConnector);
 };