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

net/proxy/dhcp_proxy_script_fetcher_win.h

Index: net/proxy/dhcp_proxy_script_fetcher_win.h
diff --git a/net/proxy/dhcp_proxy_script_fetcher_win.h b/net/proxy/dhcp_proxy_script_fetcher_win.h
index 3ca981d6a62624d256a7b5e52898b3b1d7a7c029..06410de19ce09bd5277aefc54916f53608febaac 100644
--- a/net/proxy/dhcp_proxy_script_fetcher_win.h
+++ b/net/proxy/dhcp_proxy_script_fetcher_win.h
@@ -12,7 +12,7 @@
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "net/base/net_export.h"
@@ -31,8 +31,7 @@ class URLRequestContext;
 // Windows-specific implementation.
 class NET_EXPORT_PRIVATE DhcpProxyScriptFetcherWin
     : public DhcpProxyScriptFetcher,
-      public base::SupportsWeakPtr<DhcpProxyScriptFetcherWin>,
-      NON_EXPORTED_BASE(public base::NonThreadSafe) {
+      public base::SupportsWeakPtr<DhcpProxyScriptFetcherWin> {
  public:
   // Creates a DhcpProxyScriptFetcherWin that issues requests through
   // |url_request_context|. |url_request_context| must remain valid for
@@ -178,6 +177,8 @@ class NET_EXPORT_PRIVATE DhcpProxyScriptFetcherWin
   // Worker pool we use for all DHCP lookup tasks.
   scoped_refptr<base::SequencedWorkerPool> worker_pool_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(DhcpProxyScriptFetcherWin);
 };