Replace scoped_ptr with unique_ptr in webrtc/base/

webrtc/base/natsocketfactory.h

Index: webrtc/base/natsocketfactory.h
diff --git a/webrtc/base/natsocketfactory.h b/webrtc/base/natsocketfactory.h
index 9ca0739440e8ea29e86cf78e63c5ff32cf8227d0..82c2a87eb03b8b700a56b1f71fc866da35b844ef 100644
--- a/webrtc/base/natsocketfactory.h
+++ b/webrtc/base/natsocketfactory.h
@@ -13,6 +13,7 @@
 
 #include <string>
 #include <map>
+#include <memory>
 #include <set>
 
 #include "webrtc/base/natserver.h"
@@ -116,8 +117,8 @@ class NATSocketServer : public SocketServer, public NATInternalSocketFactory {
 
    private:
     NATSocketServer* server_;
-    scoped_ptr<SocketFactory> internal_factory_;
-    scoped_ptr<NATServer> nat_server_;
+    std::unique_ptr<SocketFactory> internal_factory_;
+    std::unique_ptr<NATServer> nat_server_;
     TranslatorMap nats_;
     std::set<SocketAddress> clients_;
   };