Add ClearHistory() to ContentSuggestionsService and its providers

components/ntp_snippets/offline_pages/offline_page_suggestions_provider.cc

Index: components/ntp_snippets/offline_pages/offline_page_suggestions_provider.cc
diff --git a/components/ntp_snippets/offline_pages/offline_page_suggestions_provider.cc b/components/ntp_snippets/offline_pages/offline_page_suggestions_provider.cc
index e76f1647ec98bbb32496155865c48f14214805c8..d7f8a37f8ded74b2e8fe5b070b9cb1efb76502a6 100644
--- a/components/ntp_snippets/offline_pages/offline_page_suggestions_provider.cc
+++ b/components/ntp_snippets/offline_pages/offline_page_suggestions_provider.cc
@@ -150,6 +150,11 @@ void OfflinePageSuggestionsProvider::FetchSuggestionImage(
       FROM_HERE, base::Bind(callback, suggestion_id, gfx::Image()));
 }
 
+void OfflinePageSuggestionsProvider::ClearHistory(base::Time begin,
+                                                  base::Time end) {
+  // TODO(vitaliii): Implement.

[Marc Treib, 2016/08/30 09:50:18]

Bug?

[vitaliii, 2016/08/30 11:04:22]

Done.

+}
+
 void OfflinePageSuggestionsProvider::ClearCachedSuggestions(Category category) {
   // Ignored.
 }