Record the number of tabs in a session restore in SampledProfile

chrome/browser/extensions/state_store_notification_observer.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 "chrome/browser/extensions/state_store_notification_observer.h"
 
 #include "base/logging.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "content/public/browser/notification_service.h"
 #include "extensions/browser/state_store.h"
 
 namespace extensions {
 
 StateStoreNotificationObserver::StateStoreNotificationObserver(
     StateStore* state_store)
     : state_store_(state_store) {
   on_session_restored_callback_subscription_ =
       SessionRestore::RegisterOnSessionRestoredCallback(
           base::Bind(&StateStoreNotificationObserver::OnSessionRestoreDone,
                      base::Unretained(this)));
 }
 
 StateStoreNotificationObserver::~StateStoreNotificationObserver() {
 }
 
-void StateStoreNotificationObserver::OnSessionRestoreDone() {
+void StateStoreNotificationObserver::OnSessionRestoreDone(int /* num_tabs */) {
   on_session_restored_callback_subscription_.reset();
   state_store_->RequestInitAfterDelay();
 }
 
 }  // namespace extensions