Deprecate NonThreadSafe in remoting in favor of SequenceChecker.

remoting/signaling/fake_signal_strategy.h

Index: remoting/signaling/fake_signal_strategy.h
diff --git a/remoting/signaling/fake_signal_strategy.h b/remoting/signaling/fake_signal_strategy.h
index c4da7e472a5f8ebee135aae8ae4fc1000626c583..e22a216b15b3ce30baa41c30c8a8f475d3e7909c 100644
--- a/remoting/signaling/fake_signal_strategy.h
+++ b/remoting/signaling/fake_signal_strategy.h
@@ -12,7 +12,7 @@
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "remoting/signaling/iq_sender.h"
 #include "remoting/signaling/signal_strategy.h"
 #include "remoting/signaling/signaling_address.h"
@@ -23,8 +23,7 @@ class SingleThreadTaskRunner;
 
 namespace remoting {
 
-class FakeSignalStrategy : public SignalStrategy,
-                           public base::NonThreadSafe {
+class FakeSignalStrategy : public SignalStrategy {
  public:
   // Calls ConenctTo() to connect |peer1| and |peer2|. Both |peer1| and |peer2|
   // must belong to the current thread.
@@ -91,6 +90,8 @@ class FakeSignalStrategy : public SignalStrategy,
   // All received messages, includes thouse still in |pending_messages_|.
   std::list<buzz::XmlElement*> received_messages_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   base::WeakPtrFactory<FakeSignalStrategy> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeSignalStrategy);