Deprecate NonThreadSafe in remoting in favor of SequenceChecker.

remoting/host/win/wts_session_process_delegate.h

Index: remoting/host/win/wts_session_process_delegate.h
diff --git a/remoting/host/win/wts_session_process_delegate.h b/remoting/host/win/wts_session_process_delegate.h
index 407e0af610575df19746511b8662719d1f4ff9aa..f170c5c1b15e4c6210af1f0ffd8b0b81ed9405fa 100644
--- a/remoting/host/win/wts_session_process_delegate.h
+++ b/remoting/host/win/wts_session_process_delegate.h
@@ -12,7 +12,7 @@
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "remoting/host/win/worker_process_launcher.h"
 
 namespace base {
@@ -28,9 +28,7 @@ namespace remoting {
 
 // Implements logic for launching and monitoring a worker process in a different
 // session.
-class WtsSessionProcessDelegate
-    : public base::NonThreadSafe,
-      public WorkerProcessLauncher::Delegate {
+class WtsSessionProcessDelegate : public WorkerProcessLauncher::Delegate {
  public:
   WtsSessionProcessDelegate(
       scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
@@ -53,6 +51,8 @@ class WtsSessionProcessDelegate
   class Core;
   scoped_refptr<Core> core_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(WtsSessionProcessDelegate);
 };