Deprecate NonThreadSafe in remoting in favor of SequenceChecker.

remoting/host/win/worker_process_launcher.h

Index: remoting/host/win/worker_process_launcher.h
diff --git a/remoting/host/win/worker_process_launcher.h b/remoting/host/win/worker_process_launcher.h
index 638d633b452f89a949fe87bb8a9326d3154ca166..6c68206a2a8e2d8ca23725ed73538308720d4e78 100644
--- a/remoting/host/win/worker_process_launcher.h
+++ b/remoting/host/win/worker_process_launcher.h
@@ -13,7 +13,7 @@
 #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 "base/timer/timer.h"
 #include "base/win/object_watcher.h"
 #include "base/win/scoped_handle.h"
@@ -39,9 +39,7 @@ class WorkerProcessIpcDelegate;
 // interaction with the spawned process is through WorkerProcessIpcDelegate and
 // Send() method. In case of error the channel is closed and the worker process
 // is terminated.
-class WorkerProcessLauncher
-    : public base::NonThreadSafe,
-      public base::win::ObjectWatcher::Delegate {
+class WorkerProcessLauncher : public base::win::ObjectWatcher::Delegate {
  public:
   class Delegate {
    public:
@@ -163,6 +161,8 @@ class WorkerProcessLauncher
   // The handle of the worker process, if launched.
   base::win::ScopedHandle worker_process_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(WorkerProcessLauncher);
 };