Adding instrumentation to locate the source of jankiness.

chrome/browser/password_manager/password_store_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 "chrome/browser/password_manager/password_store_win.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/profiler/scoped_profile.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/os_crypt/ie7_password_win.h"
 #include "components/password_manager/core/browser/password_manager.h"
 #include "components/password_manager/core/browser/webdata/password_web_data_service_win.h"
 #include "content/public/browser/browser_thread.h"
 
 using autofill::PasswordForm;
 using content::BrowserThread;
 using password_manager::PasswordStoreDefault;
@@ skipping 113 matching lines @@
         password_store_->AddLoginImpl(*autofill);
       }
     }
   }
   return matching_forms;
 }
 
 void PasswordStoreWin::DBHandler::OnWebDataServiceRequestDone(
     PasswordWebDataService::Handle handle,
     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 PasswordStoreWin::DBHandler::OnWebDataServiceRequestDone"));
+
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::DB));
 
   PendingRequestMap::iterator i = pending_requests_.find(handle);
   DCHECK(i != pending_requests_.end());
 
   scoped_ptr<PasswordForm> form(i->second.form);
   PasswordStoreWin::ConsumerCallbackRunner callback_runner(
       i->second.callback_runner);
   pending_requests_.erase(i);
 
@@ skipping 52 matching lines @@
 
 void PasswordStoreWin::GetLoginsImpl(
     const PasswordForm& form,
     AuthorizationPromptPolicy prompt_policy,
     const ConsumerCallbackRunner& callback_runner) {
   ConsumerCallbackRunner get_ie7_login =
       base::Bind(&PasswordStoreWin::GetIE7LoginIfNecessary,
                  this, form, callback_runner);
   PasswordStoreDefault::GetLoginsImpl(form, prompt_policy, get_ie7_login);
 }