[Remote suggestions] Refactor the scheduler

components/ntp_snippets/remote/remote_suggestions_scheduler.h

Index: components/ntp_snippets/remote/remote_suggestions_scheduler.h
diff --git a/components/ntp_snippets/remote/remote_suggestions_scheduler.h b/components/ntp_snippets/remote/remote_suggestions_scheduler.h
index 40eb5fa6bf40a0cf25df1052b9054540472fbe66..109b61bf61f8ba56e3d0b658b97c4f4f8bed786a 100644
--- a/components/ntp_snippets/remote/remote_suggestions_scheduler.h
+++ b/components/ntp_snippets/remote/remote_suggestions_scheduler.h
@@ -29,6 +29,13 @@ class RemoteSuggestionsScheduler {
   // because history gets cleared (and we must not show them any more).
   virtual void OnHistoryCleared() = 0;
 
+  // Returns true if quota is available for another request.
+  virtual bool AcquireQuotaForInteractiveFetch() = 0;
+
+  // Called whenever the remote suggestions provider finishes an interactive
+  // fetch (with provided |fetch_status|).
+  virtual void OnInteractiveFetchFinished(Status fetch_status) = 0;
+
   // External triggers to consider fetching content suggestions.
 
   // Called whenever chrome is started warm or the user switches to Chrome.