chrome: Cleanup class/struct forward declarations

chrome/browser/ui/views/website_settings/website_settings_popup_view.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_WEBSITE_SETTINGS_WEBSITE_SETTINGS_POPUP_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_WEBSITE_SETTINGS_WEBSITE_SETTINGS_POPUP_VIEW_H_
 
 #include <memory>
 
 #include "base/compiler_specific.h"
@@ skipping 23 matching lines @@
 
 namespace security_state {
 struct SecurityInfo;
 }  // namespace security_state
 
 namespace test {
 class WebsiteSettingsPopupViewTestApi;
 }
 
 namespace views {
-class ImageButton;
-class Label;
-class LabelButton;
 class Link;
 class Widget;
 }
 
 enum : int {
   // Left icon margin.
   kPermissionIconMarginLeft = 6,
   // The width of the column that contains the permissions icons.
   kPermissionIconColumnWidth = 16,
 };
@@ skipping 113 matching lines @@
 
   // The certificate provided by the site, if one exists.
   scoped_refptr<net::X509Certificate> certificate_;
 
   base::WeakPtrFactory<WebsiteSettingsPopupView> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebsiteSettingsPopupView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_WEBSITE_SETTINGS_WEBSITE_SETTINGS_POPUP_VIEW_H_