Deprecate NonThreadSafe in remoting in favor of SequenceChecker.

remoting/host/win/rdp_client.h

Index: remoting/host/win/rdp_client.h
diff --git a/remoting/host/win/rdp_client.h b/remoting/host/win/rdp_client.h
index e30f16ecd99b6587b61994acd7434509a4ed0724..8225a524d3657c0aca7718ad84a1051991600f8e 100644
--- a/remoting/host/win/rdp_client.h
+++ b/remoting/host/win/rdp_client.h
@@ -10,7 +10,7 @@
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 
 namespace base {
 class SingleThreadTaskRunner;
@@ -21,7 +21,7 @@ namespace remoting {
 class ScreenResolution;
 
 // Establishes a loopback RDP connection to spawn a new Windows session.
-class RdpClient : public base::NonThreadSafe {
+class RdpClient {
  public:
   class EventHandler {
    public:
@@ -54,6 +54,8 @@ class RdpClient : public base::NonThreadSafe {
   class Core;
   scoped_refptr<Core> core_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(RdpClient);
 };