Adding instrumentation to locate the source of jankiness

chrome/browser/policy/cloud/user_policy_signin_service.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/policy/cloud/user_policy_signin_service.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
+#include "base/profiler/scoped_profile.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "components/policy/core/common/cloud/cloud_policy_client_registration_helper.h"
 #include "components/policy/core/common/cloud/user_cloud_policy_manager.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "content/public/browser/notification_details.h"
@@ skipping 80 matching lines @@
 
 void UserPolicySigninService::CallPolicyRegistrationCallback(
     scoped_ptr<CloudPolicyClient> client,
     PolicyRegistrationCallback callback) {
   registration_helper_.reset();
   callback.Run(client->dm_token(), client->client_id());
 }
 
 void UserPolicySigninService::OnRefreshTokenAvailable(
     const std::string& account_id) {
+  // TODO(vadimt): Remove ScopedProfile below once crbug.com/422460 is fixed.
+  tracked_objects::ScopedProfile tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422460 UserPolicySigninService::OnRefreshTokenAvailable"));
+
   // If using a TestingProfile with no UserCloudPolicyManager, skip
   // initialization.
   if (!policy_manager()) {
     DVLOG(1) << "Skipping initialization for tests due to missing components.";
     return;
   }
 
   // Ignore OAuth tokens for any account but the primary one.
   if (account_id != signin_manager()->GetAuthenticatedAccountId())
     return;
@@ skipping 69 matching lines @@
 }
 
 void UserPolicySigninService::ProhibitSignoutIfNeeded() {
   if (policy_manager()->IsClientRegistered()) {
     DVLOG(1) << "User is registered for policy - prohibiting signout";
     signin_manager()->ProhibitSignout(true);
   }
 }
 
 }  // namespace policy