Add ClearHistory() to ContentSuggestionsService and its providers

components/ntp_snippets/content_suggestions_service.h

Index: components/ntp_snippets/content_suggestions_service.h
diff --git a/components/ntp_snippets/content_suggestions_service.h b/components/ntp_snippets/content_suggestions_service.h
index bc8fb932473528d592b68b20f3d265351e4b1398..8ddd49148de5a3eafe5ac24f28e477f5269ca29b 100644
--- a/components/ntp_snippets/content_suggestions_service.h
+++ b/components/ntp_snippets/content_suggestions_service.h
@@ -13,6 +13,7 @@
 #include "base/callback_forward.h"
 #include "base/observer_list.h"
 #include "base/optional.h"
+#include "base/time/time.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "components/ntp_snippets/category_factory.h"
 #include "components/ntp_snippets/category_status.h"
@@ -119,6 +120,16 @@ class ContentSuggestionsService : public KeyedService,
   // called only once per provider.
   void RegisterProvider(std::unique_ptr<ContentSuggestionsProvider> provider);
 
+  // Removes history from the specified time range where the URL matches the
+  // |filter| from all providers. The data removed depends on the provider. Note
+  // that the data outside the time range may be deleted, for example
+  // suggestions, which are based on history from that time range. Providers
+  // should immediately clear any data related to history from the specified
+  // time range where the URL matches the |filter|.
+  void ClearHistory(base::Time begin,
+                    base::Time end,
+                    const base::Callback<bool(const GURL& url)>& filter);
+
   // Removes all suggestions from all caches or internal stores in all
   // providers. See |ClearCachedSuggestions|.
   void ClearAllCachedSuggestions();