Deprecate NonThreadSafe in net/ in favor of SequenceChecker/ThreadChecker.

net/base/network_change_notifier_win.h

Index: net/base/network_change_notifier_win.h
diff --git a/net/base/network_change_notifier_win.h b/net/base/network_change_notifier_win.h
index 687149945d162637e77e5f53c48c119e024d2e18..beef6bad9f75f944a703827cc84fdca08a58454d 100644
--- a/net/base/network_change_notifier_win.h
+++ b/net/base/network_change_notifier_win.h
@@ -13,7 +13,7 @@
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/threading/thread_checker.h"
 #include "base/timer/timer.h"
 #include "base/win/object_watcher.h"
 #include "net/base/net_export.h"
@@ -21,13 +21,12 @@
 
 namespace net {
 
-// NetworkChangeNotifierWin inherits from NonThreadSafe, as all its internal
+// NetworkChangeNotifierWin uses a ThreadChecker, as all its internal
 // notification code must be called on the thread it is created and destroyed
 // on.  All the NetworkChangeNotifier methods it implements are threadsafe.
 class NET_EXPORT_PRIVATE NetworkChangeNotifierWin
     : public NetworkChangeNotifier,
-      public base::win::ObjectWatcher::Delegate,
-      NON_EXPORTED_BASE(public base::NonThreadSafe) {
+      public base::win::ObjectWatcher::Delegate {
  public:
   NetworkChangeNotifierWin();
 
@@ -115,6 +114,8 @@ class NET_EXPORT_PRIVATE NetworkChangeNotifierWin
   // Number of times polled to check if still offline.
   int offline_polls_;
 
+  THREAD_CHECKER(thread_checker_);
+
   // Used for calling WatchForAddressChange again on failure.
   base::WeakPtrFactory<NetworkChangeNotifierWin> weak_factory_;