chrome: Cleanup class/struct forward declarations

chrome/browser/ui/views/collected_cookies_views.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_COLLECTED_COOKIES_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_COLLECTED_COOKIES_VIEWS_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "components/content_settings/core/common/content_settings.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/tabbed_pane/tabbed_pane_listener.h"
 #include "ui/views/controls/tree/tree_view_controller.h"
 #include "ui/views/window/dialog_delegate.h"
 
 class CookieInfoView;
 class CookiesTreeModel;
 class InfobarView;
 
 namespace content {
 class WebContents;
 }
 
 namespace views {
 class Label;
 class LabelButton;
 class TreeView;
-class Widget;
 }
 
 // This is the Views implementation of the collected cookies dialog.
 //
 // CollectedCookiesViews is a dialog that displays the allowed and blocked
 // cookies of the current tab contents. To display the dialog, invoke
 // ShowCollectedCookiesDialog() on the delegate of the WebContents's
 // content settings tab helper.
 class CollectedCookiesViews : public views::DialogDelegateView,
                               public content::NotificationObserver,
@@ skipping 74 matching lines @@
   CookieInfoView* cookie_info_view_;
 
   InfobarView* infobar_;
 
   bool status_changed_;
 
   DISALLOW_COPY_AND_ASSIGN(CollectedCookiesViews);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_COLLECTED_COOKIES_VIEWS_H_