Adding instrumentation to locate the source of jankiness.

components/google/core/browser/google_url_tracker.cc

 // Copyright 2014 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 "components/google/core/browser/google_url_tracker.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
+#include "base/profiler/scoped_profile.h"
 #include "base/strings/string_util.h"
 #include "components/google/core/browser/google_pref_names.h"
 #include "components/google/core/browser/google_switches.h"
 #include "components/google/core/browser/google_url_tracker_infobar_delegate.h"
 #include "components/google/core/browser/google_url_tracker_navigation_helper.h"
 #include "components/google/core/browser/google_util.h"
 #include "components/infobars/core/infobar.h"
 #include "components/infobars/core/infobar_manager.h"
 #include "net/base/load_flags.h"
 #include "net/base/net_util.h"
@@ skipping 79 matching lines @@
 }
 
 void GoogleURLTracker::CancelGoogleURL() {
   client_->GetPrefs()->SetString(prefs::kLastPromptedGoogleURL,
                                  fetched_google_url_.spec());
   need_to_prompt_ = false;
   CloseAllEntries(false);
 }
 
 void GoogleURLTracker::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 GoogleURLTracker::OnURLFetchComplete"));
+
   // Delete the fetcher on this function's exit.
   scoped_ptr<net::URLFetcher> clean_up_fetcher(fetcher_.release());
 
   // Don't update the URL if the request didn't succeed.
   if (!source->GetStatus().is_success() || (source->GetResponseCode() != 200)) {
     already_fetched_ = false;
     return;
   }
 
   // See if the response data was valid.  It should be
@@ skipping 287 matching lines @@
   }
   if (client_->IsListeningForNavigationStart()) {
     DCHECK(!search_committed_);
     client_->SetListeningForNavigationStart(false);
   }
 }
 
 void GoogleURLTracker::NotifyGoogleURLUpdated() {
   callback_list_.Notify();
 }