[Remote suggestions] Get favicon URLs from archive

components/ntp_snippets/remote/remote_suggestions_provider_impl.cc

 // 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/ntp_snippets/remote/remote_suggestions_provider_impl.h"
 
 #include <algorithm>
 #include <iterator>
 #include <utility>
 
@@ skipping 321 matching lines @@
 void RemoteSuggestionsProviderImpl::RefetchInTheBackground(
     const FetchStatusCallback& callback) {
   FetchSuggestions(/*interactive_request=*/false, callback);
 }
 
 const RemoteSuggestionsFetcher*
 RemoteSuggestionsProviderImpl::suggestions_fetcher_for_debugging() const {
   return suggestions_fetcher_.get();
 }
 
+GURL RemoteSuggestionsProviderImpl::GetUrlWithFavicon(
+    const ContentSuggestion::ID& suggestion_id) const {
+  DCHECK(base::ContainsKey(category_contents_, suggestion_id.category()));
+
+  const CategoryContent& content =
+      category_contents_.at(suggestion_id.category());
+  const RemoteSuggestion* suggestion =
+      content.FindSuggestion(suggestion_id.id_within_category());
+  if (!suggestion) {
+    return GURL();
+  }
+  return ContentSuggestion::GetFaviconDomain(suggestion->url());
+}
+
 void RemoteSuggestionsProviderImpl::FetchSuggestions(
     bool interactive_request,
     const FetchStatusCallback& callback) {
   if (!ready()) {
     fetch_when_ready_ = true;
     fetch_when_ready_interactive_ = interactive_request;
     fetch_when_ready_callback_ = callback;
     return;
   }
 
@@ skipping 925 matching lines @@
 RemoteSuggestionsProviderImpl::CategoryContent::CategoryContent(
     CategoryContent&&) = default;
 
 RemoteSuggestionsProviderImpl::CategoryContent::~CategoryContent() = default;
 
 RemoteSuggestionsProviderImpl::CategoryContent&
 RemoteSuggestionsProviderImpl::CategoryContent::operator=(CategoryContent&&) =
     default;
 
 }  // namespace ntp_snippets