GuestView: Use Weak Pointers Throughout

chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.h

 // 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.
 
 #ifndef CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_CHROME_WEB_VIEW_GUEST_DELEGATE_H_
 #define CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_CHROME_WEB_VIEW_GUEST_DELEGATE_H_
 
 #include "chrome/browser/extensions/api/web_view/chrome_web_view_internal_api.h"
 #include "chrome/browser/ui/zoom/zoom_observer.h"
 #include "extensions/browser/guest_view/web_view/web_view_guest.h"
@@ skipping 70 matching lines @@
   scoped_ptr<RenderViewContextMenu> pending_menu_;
 
 #if defined(OS_CHROMEOS)
   // Subscription to receive notifications on changes to a11y settings.
   scoped_ptr<chromeos::AccessibilityStatusSubscription>
       accessibility_subscription_;
 #endif
 
   extensions::WebViewGuest* const web_view_guest_;
 
+  // This is used to ensure pending tasks will not fire after this object is
+  // destroyed.
+  base::WeakPtrFactory<ChromeWebViewGuestDelegate> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeWebViewGuestDelegate);
 };
 
 #endif  // CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_CHROME_WEB_VIEW_GUEST_DELEGATE_H_