[Remote suggestions] Interface for additional triggers for 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 be4c215e89b4445cd52b60b76283f7b4ed6137c4..953592ae461dce70fdfd2e9a78a89e0511ece865 100644
--- a/components/ntp_snippets/remote/remote_suggestions_scheduler.h
+++ b/components/ntp_snippets/remote/remote_suggestions_scheduler.h
@@ -12,6 +12,10 @@ namespace ntp_snippets {
 // Interface for informing the scheduler.
 class RemoteSuggestionsScheduler {
  public:
+  // External triggers to consider fetching content suggestions.
+  virtual void OnBrowserStartup() = 0;
+  virtual void OnNTPOpened() = 0;
+
   // Fetch content suggestions.
   virtual void OnPersistentSchedulerWakeUp() = 0;