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 94bab7f8d100213744e72863ebb4a2b0aa6b51b8..6a503f9658b03ecd3486c1e2b45057030c170d4f 100644
--- a/net/base/network_change_notifier_win.h
+++ b/net/base/network_change_notifier_win.h
@@ -12,7 +12,7 @@
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "base/timer/timer.h"
 #include "base/win/object_watcher.h"
 #include "net/base/net_export.h"
@@ -25,8 +25,7 @@ namespace net {
 // 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) {

[Ryan Sleevi, 2017/05/26 11:54:50]

I'm not sure on this one

+      public base::win::ObjectWatcher::Delegate {
  public:
   NetworkChangeNotifierWin();
 
@@ -108,6 +107,8 @@ class NET_EXPORT_PRIVATE NetworkChangeNotifierWin
   // Number of times polled to check if still offline.
   int offline_polls_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   // Used for calling WatchForAddressChange again on failure.
   base::WeakPtrFactory<NetworkChangeNotifierWin> weak_factory_;