Replace "nested message loop" with "nested run loop" in comments.

chrome/browser/sessions/session_restore.cc

 // Copyright 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/sessions/session_restore.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 698 matching lines @@
 
   // Set of URLs to open in addition to those restored from the session.
   std::vector<GURL> urls_to_open_;
 
   // Used to get the session.
   base::CancelableTaskTracker cancelable_task_tracker_;
 
   // Responsible for loading the tabs.
   scoped_refptr<TabLoader> tab_loader_;
 
-  // When synchronous we run a nested message loop. To avoid creating windows
-  // from the nested message loop (which can make exiting the nested message
+  // When synchronous we run a nested run loop. To avoid creating windows
+  // from the nested run loop (which can make exiting the nested message
   // loop take a while) we cache the SessionWindows here and create the actual
-  // windows when the nested message loop exits.
+  // windows when the nested run loop exits.
   std::vector<std::unique_ptr<sessions::SessionWindow>> windows_;
   SessionID::id_type active_window_id_;
 
   content::NotificationRegistrar registrar_;
 
   // When asynchronous it's possible for there to be no windows. To make sure
   // Chrome doesn't prematurely exit we register a KeepAlive for the lifetime
   // of this object.
   std::unique_ptr<ScopedKeepAlive> keep_alive_;
 
@@ skipping 110 matching lines @@
 // static
 SessionRestore::CallbackSubscription
     SessionRestore::RegisterOnSessionRestoredCallback(
         const base::Callback<void(int)>& callback) {
   return on_session_restored_callbacks()->Add(callback);
 }
 
 // static
 base::CallbackList<void(int)>*
     SessionRestore::on_session_restored_callbacks_ = nullptr;