Adding instrumentation to locate the source of jankiness.

components/autofill/core/browser/personal_data_manager.cc

 // Copyright 2013 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/autofill/core/browser/personal_data_manager.h"
 
 #include <algorithm>
 #include <functional>
 #include <iterator>
 
 #include "base/i18n/timezone.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/prefs/pref_service.h"
+#include "base/profiler/scoped_profile.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/autofill/core/browser/address_i18n.h"
 #include "components/autofill/core/browser/autofill-inl.h"
 #include "components/autofill/core/browser/autofill_country.h"
 #include "components/autofill/core/browser/autofill_field.h"
 #include "components/autofill/core/browser/form_structure.h"
 #include "components/autofill/core/browser/personal_data_manager_observer.h"
 #include "components/autofill/core/browser/phone_number.h"
@@ skipping 156 matching lines @@
   CancelPendingQuery(&pending_profiles_query_);
   CancelPendingQuery(&pending_creditcards_query_);
 
   if (database_.get())
     database_->RemoveObserver(this);
 }
 
 void PersonalDataManager::OnWebDataServiceRequestDone(
     WebDataServiceBase::Handle h,
     const WDTypedResult* result) {
+  // TODO(vadimt): Remove ScopedProfile below once crbug.com/422460 is fixed.
+  tracked_objects::ScopedProfile tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422460 PersonalDataManager::OnWebDataServiceRequestDone"));
+
   DCHECK(pending_profiles_query_ || pending_creditcards_query_);
 
   if (!result) {
     // Error from the web database.
     if (h == pending_creditcards_query_)
       pending_creditcards_query_ = 0;
     else if (h == pending_profiles_query_)
       pending_profiles_query_ = 0;
     return;
   }
@@ skipping 909 matching lines @@
   // Populates |auxiliary_profiles_|.
   LoadAuxiliaryProfiles(record_metrics);
 
   profiles_.insert(profiles_.end(), web_profiles_.begin(), web_profiles_.end());
   profiles_.insert(
       profiles_.end(), auxiliary_profiles_.begin(), auxiliary_profiles_.end());
   return profiles_;
 }
 
 }  // namespace autofill