Add support for attaching custom parameters to NetLog events.

net/proxy/proxy_service.cc

 // Copyright (c) 2006-2008 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.
 
 #include "net/proxy/proxy_service.h"
 
 #include <algorithm>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
@@ skipping 446 matching lines @@
                                           const BoundNetLog& net_log) {
   // Log the result of the proxy resolution.
   if (result_code == OK) {
     // When full logging is enabled, dump the proxy list.
     if (net_log.HasListener()) {
       net_log.AddString(
           std::string("Resolved proxy list: ") + result->ToPacString());
     }
     result->DeprioritizeBadProxies(proxy_retry_info_);
   } else {
-    net_log.AddStringLiteral(
-        "Got an error from proxy resolver, falling-back to DIRECT.");
-    net_log.AddErrorCode(result_code);
+    net_log.AddString(StringPrintf(
+        "Got an error from proxy resolver (%d), falling-back to DIRECT.",
+        result_code));
 
     // Fall-back to direct when the proxy resolver fails. This corresponds
     // with a javascript runtime error in the PAC script.
     //
     // This implicit fall-back to direct matches Firefox 3.5 and
     // Internet Explorer 8. For more information, see:
     //
     // http://www.chromium.org/developers/design-documents/proxy-settings-fallback
     result->UseDirect();
     result_code = OK;
@@ skipping 249 matching lines @@
     OnCompletion(result_);
   }
 }
 
 void SyncProxyServiceHelper::OnCompletion(int rv) {
   result_ = rv;
   event_.Signal();
 }
 
 }  // namespace net