Adding instrumentation to locate the source of jankiness.

chrome/browser/intranet_redirect_detector.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 "chrome/browser/intranet_redirect_detector.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
+#include "base/profiler/scoped_profile.h"
 #include "base/rand_util.h"
 #include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "net/base/load_flags.h"
 #include "net/base/net_errors.h"
 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 #include "net/url_request/url_fetcher.h"
@@ skipping 66 matching lines @@
                           net::LOAD_DO_NOT_SAVE_COOKIES |
                           net::LOAD_DO_NOT_SEND_COOKIES);
     fetcher->SetRequestContext(g_browser_process->system_request_context());
     fetcher->Start();
     fetchers_.insert(fetcher);
   }
 }
 
 void IntranetRedirectDetector::OnURLFetchComplete(
     const net::URLFetcher* source) {
+  // TODO(vadimt): Remove ScopedProfile below once crbug.com/422577 is fixed.
+  tracked_objects::ScopedProfile tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422577 IntranetRedirectDetector::OnURLFetchComplete"));
+
   // Delete the fetcher on this function's exit.
   Fetchers::iterator fetcher = fetchers_.find(
       const_cast<net::URLFetcher*>(source));
   DCHECK(fetcher != fetchers_.end());
   scoped_ptr<net::URLFetcher> clean_up_fetcher(*fetcher);
   fetchers_.erase(fetcher);
 
   // If any two fetches result in the same domain/host, we set the redirect
   // origin to that; otherwise we set it to nothing.
   if (!source->GetStatus().is_success() || (source->GetResponseCode() != 200)) {
@@ skipping 48 matching lines @@
 
   // Since presumably many programs open connections after network changes,
   // delay this a little bit.
   in_sleep_ = true;
   static const int kNetworkSwitchDelayMS = 1000;
   base::MessageLoop::current()->PostDelayedTask(FROM_HERE,
       base::Bind(&IntranetRedirectDetector::FinishSleep,
                  weak_ptr_factory_.GetWeakPtr()),
       base::TimeDelta::FromMilliseconds(kNetworkSwitchDelayMS));
 }