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

chrome/browser/history/expire_history_backend.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_HISTORY_EXPIRE_HISTORY_BACKEND_H_
 #define CHROME_BROWSER_HISTORY_EXPIRE_HISTORY_BACKEND_H_
 
 #include <queue>
 #include <set>
 #include <vector>
@@ skipping 18 matching lines @@
 class ThumbnailDatabase;
 
 // Delegate used to broadcast notifications to the main thread.
 class BroadcastNotificationDelegate {
  public:
   // Schedules a broadcast of the given notification on the application main
   // thread. The details argument will have ownership taken by this function.
   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() {}
 };
 
 // Encapsulates visit expiration criteria and type of visits to expire.
 class ExpiringVisitsReader {
  public:
   virtual ~ExpiringVisitsReader() {}
   // Populates |visits| from |db|, using provided |end_time| and |max_visits|
   // cap.
@@ skipping 245 matching lines @@
   // Use GetBookmarkService to access this, which makes sure the service is
   // loaded.
   BookmarkService* bookmark_service_;
 
   DISALLOW_COPY_AND_ASSIGN(ExpireHistoryBackend);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_EXPIRE_HISTORY_BACKEND_H_