TopSites: filter out non-WebSafe URLs

ios/chrome/browser/history/history_backend_client_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 "ios/chrome/browser/history/history_backend_client_impl.h"
 
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "url/gurl.h"
 
 HistoryBackendClientImpl::HistoryBackendClientImpl(
@@ skipping 30 matching lines @@
   bookmarks->reserve(bookmarks->size() + url_and_titles.size());
   for (const auto& url_and_title : url_and_titles) {
     history::URLAndTitle value = {url_and_title.url, url_and_title.title};
     bookmarks->push_back(value);
   }
 }
 
 bool HistoryBackendClientImpl::ShouldReportDatabaseError() {
   return false;
 }
+
+bool HistoryBackendClientImpl::IsWebSafe(const GURL& url) {
+  return url.SchemeIsHTTPOrHTTPS();
+}