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

chrome/browser/history/history_service.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_HISTORY_SERVICE_H_
 #define CHROME_BROWSER_HISTORY_HISTORY_SERVICE_H_
 
 #include <set>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/string16.h"
 #include "base/threading/thread_checker.h"
 #include "base/time.h"
 #include "chrome/browser/common/cancelable_request.h"
 #include "chrome/browser/favicon/favicon_service.h"
 #include "chrome/browser/history/delete_directive_handler.h"
 #include "chrome/browser/history/history_types.h"
+#include "chrome/browser/history/typed_url_syncable_service.h"
 #include "chrome/browser/profiles/profile_keyed_service.h"
 #include "chrome/browser/search_engines/template_url_id.h"
 #include "chrome/common/cancelable_task_tracker.h"
 #include "chrome/common/ref_counted_util.h"
 #include "components/visitedlink/browser/visitedlink_delegate.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/common/page_transition_types.h"
 #include "sql/init_status.h"
 #include "sync/api/syncable_service.h"
@@ skipping 114 matching lines @@
 
   // Reads the number of times the user has typed the given URL.
   bool GetTypedCountForURL(const GURL& url, int* typed_count);
 
   // Reads the last visit time for the given URL.
   bool GetLastVisitTimeForURL(const GURL& url, base::Time* last_visit);
 
   // Reads the number of times this URL has been visited.
   bool GetVisitCountForURL(const GURL& url, int* visit_count);
 
+  // Returns a pointer to the TypedUrlSyncableService owned by HistoryBackend.
+  // This method should only be called from the history thread, because the
+  // returned service is intended to be accessed only via the history thread.
+  history::TypedUrlSyncableService* GetTypedUrlSyncableService() const;
+
   // Return the quick history index.
   history::InMemoryURLIndex* InMemoryIndex() const {
     return in_memory_url_index_.get();
   }
 
   // ProfileKeyedService:
   virtual void Shutdown() OVERRIDE;
 
   // Navigation ----------------------------------------------------------------
 
@@ skipping 915 matching lines @@
   scoped_ptr<history::InMemoryURLIndex> in_memory_url_index_;
 
   ObserverList<history::VisitDatabaseObserver> visit_database_observers_;
 
   history::DeleteDirectiveHandler delete_directive_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryService);
 };
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_SERVICE_H_