Change NetLog::ParametersCallback to return a scoped_ptr.

net/proxy/proxy_script_decider.h

Index: net/proxy/proxy_script_decider.h
diff --git a/net/proxy/proxy_script_decider.h b/net/proxy/proxy_script_decider.h
index 9b1d4a80f9b3afa67361da8ef76f2ba5e75a9b6b..48220e29f7a02e7ff3a20cfe4f13fc92fda928d4 100644
--- a/net/proxy/proxy_script_decider.h
+++ b/net/proxy/proxy_script_decider.h
@@ -101,8 +101,9 @@ class NET_EXPORT_PRIVATE ProxyScriptDecider {
     // Returns a Value representing the PacSource.  |effective_pac_url| must
     // be non-NULL and point to the URL derived from information contained in
     // |this|, if Type is not WPAD_DHCP.
-    base::Value* NetLogCallback(const GURL* effective_pac_url,
-                                NetLogCaptureMode capture_mode) const;
+    scoped_ptr<base::Value> NetLogCallback(
+        const GURL* effective_pac_url,
+        NetLogCaptureMode capture_mode) const;
 
     Type type;
     GURL url;  // Empty unless |type == PAC_SOURCE_CUSTOM|.