Fix IWYU violators that don't include scoped_ptr.h in CrOS build.

chrome/browser/ui/views/ash/tab_scrubber.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_ASH_TAB_SCRUBBER_H_
 #define CHROME_BROWSER_UI_VIEWS_ASH_TAB_SCRUBBER_H_
 
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/ui/views/frame/immersive_mode_controller.h"
 #include "chrome/browser/ui/views/tabs/tab_strip_observer.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "ui/events/event_handler.h"
 
 class Browser;
 class Tab;
 class TabStrip;
@@ skipping 89 matching lines @@
   // Forces the tabs to be revealed if we are in immersive fullscreen.
   scoped_ptr<ImmersiveRevealedLock> immersive_reveal_lock_;
 
   content::NotificationRegistrar registrar_;
   base::WeakPtrFactory<TabScrubber> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TabScrubber);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_ASH_TAB_SCRUBBER_H_