Add support to process favicons from Web Manifests

components/favicon/ios/web_favicon_driver.mm

 // 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.
 
 #include "components/favicon/ios/web_favicon_driver.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "components/favicon/core/favicon_url.h"
@@ skipping 84 matching lines @@
           }
         }
         callback.Run(local_download_id, metadata.http_response_code, local_url,
                      frames, sizes);
       };
   image_fetcher_.FetchImageDataWebpDecoded(url, local_callback);
 
   return downloaded_image_count;
 }
 
+void WebFaviconDriver::DownloadManifest(const GURL& url,
+                                        ManifestDownloadCallback callback) {
+  NOTREACHED();
+}
+
 bool WebFaviconDriver::IsOffTheRecord() {
   DCHECK(web_state());
   return web_state()->GetBrowserState()->IsOffTheRecord();
 }
 
 void WebFaviconDriver::OnFaviconUpdated(
     const GURL& page_url,
     FaviconDriverObserver::NotificationIconType notification_icon_type,
     const GURL& icon_url,
     bool icon_url_changed,
@@ skipping 19 matching lines @@
       FaviconDriverImpl(favicon_service, history_service, bookmark_model),
       image_fetcher_(web_state->GetBrowserState()->GetRequestContext(),
                      web::WebThread::GetBlockingPool()) {}
 
 WebFaviconDriver::~WebFaviconDriver() {
 }
 
 void WebFaviconDriver::FaviconUrlUpdated(
     const std::vector<web::FaviconURL>& candidates) {
   DCHECK(!candidates.empty());
-  OnUpdateCandidates(GetActiveURL(), FaviconURLsFromWebFaviconURLs(candidates));
+  OnUpdateCandidates(GetActiveURL(), FaviconURLsFromWebFaviconURLs(candidates),
+                     GURL());
 }
 
 }  // namespace favicon