TopSites: filter out non-WebSafe URLs

ios/chrome/browser/history/history_backend_client_impl.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 IOS_CHROME_BROWSER_HISTORY_HISTORY_BACKEND_CLIENT_IMPL_H_
 #define IOS_CHROME_BROWSER_HISTORY_HISTORY_BACKEND_CLIENT_IMPL_H_
 
 #include <vector>
 
 #include "base/macros.h"
 #include "components/history/core/browser/history_backend_client.h"
 
 class GURL;
 
 namespace bookmarks {
 class BookmarkModel;
 }
 
 class HistoryBackendClientImpl : public history::HistoryBackendClient {
  public:
   explicit HistoryBackendClientImpl(bookmarks::BookmarkModel* bookmark_model);
   ~HistoryBackendClientImpl() override;
 
  private:
   // history::HistoryBackendClient implementation.
   bool IsBookmarked(const GURL& url) override;
   void GetBookmarks(std::vector<history::URLAndTitle>* bookmarks) override;
   bool ShouldReportDatabaseError() override;
+  bool IsWebSafe(const GURL& url) override;
 
   // BookmarkModel instance providing access to bookmarks. May be null during
   // testing but must outlive HistoryBackendClientImpl if non-null.
   bookmarks::BookmarkModel* bookmark_model_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryBackendClientImpl);
 };
 
 #endif  // IOS_CHROME_BROWSER_HISTORY_HISTORY_BACKEND_CLIENT_IMPL_H_