Add ClearHistory() to ContentSuggestionsService and its providers

components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h

Index: components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h
diff --git a/components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h b/components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h
index e9bf12c5fe4a844c9ff677ce2965bf92096b9701..5fe496b0246286443398721e7cdd4f16e68f67f0 100644
--- a/components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h
+++ b/components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h
@@ -42,6 +42,9 @@ class BookmarkSuggestionsProvider : public ContentSuggestionsProvider,
   void DismissSuggestion(const std::string& suggestion_id) override;
   void FetchSuggestionImage(const std::string& suggestion_id,
                             const ImageFetchedCallback& callback) override;
+  void ClearHistory(base::Time begin,
+                    base::Time end,
+                    base::Callback<bool(const GURL& url)> filter) override;

[Marc Treib, 2016/08/30 13:01:56]

This should be a const &

[vitaliii, 2016/08/30 14:17:48]

Done.

   void ClearCachedSuggestions(Category category) override;
   void GetDismissedSuggestionsForDebugging(
       Category category,