Add ClearHistory() to ContentSuggestionsService and its providers

components/ntp_snippets/content_suggestions_service.cc

Index: components/ntp_snippets/content_suggestions_service.cc
diff --git a/components/ntp_snippets/content_suggestions_service.cc b/components/ntp_snippets/content_suggestions_service.cc
index 725d24148ba1d381fd6318b1bf0eb2af82c0f2b8..aee5519d0ba8526c02dfd4312e496a20d75f8a47 100644
--- a/components/ntp_snippets/content_suggestions_service.cc
+++ b/components/ntp_snippets/content_suggestions_service.cc
@@ -81,6 +81,15 @@ void ContentSuggestionsService::FetchSuggestionImage(
                                                          callback);
 }
 
+void ContentSuggestionsService::ClearHistory(
+    base::Time begin,
+    base::Time end,
+    base::Callback<bool(const GURL& url)> filter) {
+  for (const auto& provider : providers_) {
+    provider->ClearHistory(begin, end, filter);
+  }
+}
+
 void ContentSuggestionsService::ClearAllCachedSuggestions() {
   suggestions_by_category_.clear();
   id_category_map_.clear();