Adding instrumentation to locate the source of jankiness.

net/proxy/proxy_config_service_win.cc

 // 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.
 
 #include "net/proxy/proxy_config_service_win.h"
 
 #include <windows.h>
 #include <winhttp.h>
 
 #include "base/bind.h"
@@ skipping 98 matching lines @@
   }
 
   keys_to_watch_.push_back(key.release());
   return true;
 }
 
 void ProxyConfigServiceWin::OnObjectSignaled(base::win::RegKey* key) {
   // TODO(vadimt): Remove ScopedTracker below once crbug.com/418183 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "ProxyConfigServiceWin_OnObjectSignaled"));
+          "418183 ProxyConfigServiceWin::OnObjectSignaled"));
 
   // Figure out which registry key signalled this change.
   RegKeyList::iterator it =
       std::find(keys_to_watch_.begin(), keys_to_watch_.end(), key);
   DCHECK(it != keys_to_watch_.end());
 
   // Keep watching the registry key.
   if (!key->StartWatching(base::Bind(&ProxyConfigServiceWin::OnObjectSignaled,
                                      base::Unretained(this),
                                      base::Unretained(key)))) {
@@ skipping 39 matching lines @@
       std::string bypass_url_domain = proxy_server_bypass_list.token();
       config->proxy_rules().bypass_rules.AddRuleFromString(bypass_url_domain);
     }
   }
   if (ie_config.lpszAutoConfigUrl)
     config->set_pac_url(GURL(ie_config.lpszAutoConfigUrl));
   config->set_source(PROXY_CONFIG_SOURCE_SYSTEM);
 }
 
 }  // namespace net