Minor C++ fixes found by Clang.

chrome/browser/sessions/tab_restore_service.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef CHROME_BROWSER_SESSIONS_TAB_RESTORE_SERVICE_H_
 #define CHROME_BROWSER_SESSIONS_TAB_RESTORE_SERVICE_H_
 
 #include <list>
 #include <set>
 #include <vector>
 
 #include "base/observer_list.h"
 #include "base/time.h"
 #include "chrome/browser/sessions/base_session_service.h"
 #include "chrome/browser/sessions/session_id.h"
+#include "chrome/browser/sessions/session_types.h"
 
 class Browser;
 class NavigationController;
 class Profile;
 struct SessionWindow;
 
 // TabRestoreService is responsible for maintaining the most recently closed
 // tabs and windows. When a tab is closed
 // TabRestoreService::CreateHistoricalTab is invoked and a Tab is created to
 // represent the tab. Similarly, when a browser is closed, BrowserClosing is
@@ skipping 301 matching lines @@
   // entries_.
   std::vector<Entry*> staging_entries_;
 
   TimeFactory* time_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TabRestoreService);
 };
 
 #endif  // CHROME_BROWSER_SESSIONS_TAB_RESTORE_SERVICE_H_