Change NetLog::ParametersCallback to return a scoped_ptr.

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 <string>
 
 #include "build/build_config.h"
@@ skipping 53 matching lines @@
 #define SOURCE_TYPE(label) SOURCE_##label,
 #include "net/log/net_log_source_type_list.h"
 #undef SOURCE_TYPE
     SOURCE_COUNT
   };
 
   // A callback function that return a Value representation of the parameters
   // associated with an event.  If called, it will be called synchonously,
   // so it need not have owning references.  May be called more than once, or
   // not at all.  May return NULL.
-  typedef base::Callback<base::Value*(NetLogCaptureMode)> ParametersCallback;
+  typedef base::Callback<scoped_ptr<base::Value>(NetLogCaptureMode)>
+      ParametersCallback;
 
   // Identifies the entity that generated this log. The |id| field should
   // uniquely identify the source, and is used by log observers to infer
   // message groupings. Can use NetLog::NextID() to create unique IDs.
   struct NET_EXPORT Source {
     static const uint32 kInvalidId;
 
     Source();
     Source(SourceType type, uint32 id);
     bool IsValid() const;
@@ skipping 303 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_