components: Cleanup class/struct fwd declarations

components/favicon/ios/web_favicon_driver.h

 // Copyright 2015 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 COMPONENTS_FAVICON_IOS_WEB_FAVICON_DRIVER_H_
 #define COMPONENTS_FAVICON_IOS_WEB_FAVICON_DRIVER_H_
 
 #include "base/macros.h"
 #include "components/favicon/core/favicon_driver_impl.h"
 #include "ios/web/public/web_state/web_state_observer.h"
 #include "ios/web/public/web_state/web_state_user_data.h"
 
 namespace web {
-struct FaviconStatus;
 class WebState;
 }
 
 namespace favicon {
 
 // WebFaviconDriver is an implementation of FaviconDriver that listen to
 // WebState events to start download of favicons and to get informed when the
 // favicon download has completed.
 class WebFaviconDriver : public web::WebStateObserver,
                          public web::WebStateUserData<WebFaviconDriver>,
@@ skipping 33 matching lines @@
 
   // The URL passed to FetchFavicon().
   GURL fetch_favicon_url_;
 
   DISALLOW_COPY_AND_ASSIGN(WebFaviconDriver);
 };
 
 }  // namespace favicon
 
 #endif  // COMPONENTS_FAVICON_IOS_WEB_FAVICON_DRIVER_H_