Change NetLog::ParametersCallback to return a scoped_ptr.

net/http/http_response_headers.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_HTTP_HTTP_RESPONSE_HEADERS_H_
 #define NET_HTTP_HTTP_RESPONSE_HEADERS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 268 matching lines @@
   // |*instance_length| = size in bytes of the object requested
   // If any of the above values is unknown, its value will be -1.
   bool GetContentRange(int64* first_byte_position,
                        int64* last_byte_position,
                        int64* instance_length) const;
 
   // Returns true if the response is chunk-encoded.
   bool IsChunkEncoded() const;
 
   // Creates a Value for use with the NetLog containing the response headers.
-  base::Value* NetLogCallback(NetLogCaptureMode capture_mode) const;
+  scoped_ptr<base::Value> NetLogCallback(NetLogCaptureMode capture_mode) const;
 
   // Takes in a Value created by the above function, and attempts to create a
   // copy of the original headers.  Returns true on success.  On failure,
   // clears |http_response_headers|.
   // TODO(mmenke):  Long term, we want to remove this, and migrate external
   //                consumers to be NetworkDelegates.
   static bool FromNetLogParam(
       const base::Value* event_param,
       scoped_refptr<HttpResponseHeaders>* http_response_headers);
 
@@ skipping 109 matching lines @@
 
   // The parsed http version number (not normalized).
   HttpVersion parsed_http_version_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpResponseHeaders);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_RESPONSE_HEADERS_H_