Don't use deprecated ListValue::Append(Value*) overload.

net/log/net_log.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_LOG_NET_LOG_H_
 #define NET_LOG_NET_LOG_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 114 matching lines @@
   class NET_EXPORT Entry {
    public:
     Entry(const EntryData* data, NetLogCaptureMode capture_mode);
     ~Entry();
 
     EventType type() const { return data_->type; }
     Source source() const { return data_->source; }
     EventPhase phase() const { return data_->phase; }
 
     // Serializes the specified event to a Value.  The Value also includes the
-    // current time.  Caller takes ownership of returned Value.  Takes in a time
-    // to allow back-dating entries.
-    base::Value* ToValue() const;
+    // current time.  Takes in a time to allow back-dating entries.
+    std::unique_ptr<base::Value> ToValue() const;
 
     // Returns the parameters as a Value.  Returns NULL if there are no
-    // parameters.  Caller takes ownership of returned Value.
+    // parameters.
     std::unique_ptr<base::Value> ParametersToValue() const;
 
    private:
     const EntryData* const data_;
 
     // Log capture mode when the event occurred.
     const NetLogCaptureMode capture_mode_;
 
     // It is not safe to copy this class, since |parameters_callback_| may
     // include pointers that become stale immediately after the event is added,
@@ skipping 245 matching lines @@
   NetLog::Source source_;
   NetLog* net_log_;
 
   // TODO(eroman): Temporary until crbug.com/467797 is solved.
   Liveness liveness_ = ALIVE;
 };
 
 }  // namespace net
 
 #endif  // NET_LOG_NET_LOG_H_