[Sync] Add interface and backend impl for typed URL syncable service

chrome/browser/history/expire_history_backend.h

Index: chrome/browser/history/expire_history_backend.h
diff --git a/chrome/browser/history/expire_history_backend.h b/chrome/browser/history/expire_history_backend.h
index 3324e95788cbb6774a52dadf4b4d07009367cef2..911ecb2afeb7f15b74efe5408073edeef00126bd 100644
--- a/chrome/browser/history/expire_history_backend.h
+++ b/chrome/browser/history/expire_history_backend.h
@@ -36,6 +36,11 @@ class BroadcastNotificationDelegate {
   virtual void BroadcastNotifications(int type,
                                       HistoryDetails* details_deleted) = 0;
 
+  // Trigger handling of deleted urls in typed url sync code
+  virtual void NotifySyncURLsDeleted(bool all_history,
+                                     bool archived,
+                                     URLRows* rows) = 0;
+
  protected:
   virtual ~BroadcastNotificationDelegate() {}
 };