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

net/url_request/url_request.h

Index: net/url_request/url_request.h
diff --git a/net/url_request/url_request.h b/net/url_request/url_request.h
index 95a26676dcaeb6b7513d8fe502ff3376351bfbb2..41410703af7ee903e588d502d1284dcb7680e667 100644
--- a/net/url_request/url_request.h
+++ b/net/url_request/url_request.h
@@ -17,7 +17,7 @@
 #include "base/optional.h"
 #include "base/strings/string16.h"
 #include "base/supports_user_data.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/threading/thread_checker.h"
 #include "base/time/time.h"
 #include "net/base/auth.h"
 #include "net/base/completion_callback.h"
@@ -69,8 +69,7 @@ class X509Certificate;
 //
 // NOTE: All usage of all instances of this class should be on the same thread.
 //
-class NET_EXPORT URLRequest : NON_EXPORTED_BASE(public base::NonThreadSafe),
-                              public base::SupportsUserData {
+class NET_EXPORT URLRequest : public base::SupportsUserData {
  public:
   // Callback function implemented by protocol handlers to create new jobs.
   // The factory may return NULL to indicate an error, which will cause other
@@ -862,6 +861,8 @@ class NET_EXPORT URLRequest : NON_EXPORTED_BASE(public base::NonThreadSafe),
 
   const NetworkTrafficAnnotationTag traffic_annotation_;
 
+  THREAD_CHECKER(thread_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(URLRequest);
 };