Change scoped_ptr to std::unique_ptr in //net.

net/log/test_net_log.cc

Index: net/log/test_net_log.cc
diff --git a/net/log/test_net_log.cc b/net/log/test_net_log.cc
index c8d04cb71f1c9ee6a76964a13e8bd94644db728e..3287cf0a9d4d53bf5827979e72c212eec8c174a2 100644
--- a/net/log/test_net_log.cc
+++ b/net/log/test_net_log.cc
@@ -50,7 +50,7 @@ class TestNetLog::Observer : public NetLog::ThreadSafeObserver {
   void OnAddEntry(const NetLog::Entry& entry) override {
     // Using Dictionaries instead of Values makes checking values a little
     // simpler.
-    scoped_ptr<base::DictionaryValue> param_dict =
+    std::unique_ptr<base::DictionaryValue> param_dict =
         base::DictionaryValue::From(entry.ParametersToValue());
 
     // Only need to acquire the lock when accessing class variables.