[SyncFS] Run LocalToRemoteSyncer as SyncTask

chrome/browser/sync_file_system/drive_backend/sync_task_token.h

 // Copyright 2014 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_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_TOKEN_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_TOKEN_H_
 
 #include "base/callback.h"
 #include "base/location.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/sync_file_system/sync_callbacks.h"
 
 namespace sync_file_system {
 namespace drive_backend {
 
 class SyncTaskManager;
 struct BlockingFactor;
 
 // Represents a running sequence of SyncTasks.  Owned by a callback chain that
 // should run exclusively, and held by SyncTaskManager when no task is running.
 class SyncTaskToken {
  public:
+  static const int64 kTestingTaskTokenID;
   static const int64 kForegroundTaskTokenID;
   static const int64 kMinimumBackgroundTaskTokenID;
 
+  static scoped_ptr<SyncTaskToken> CreateForTesting(
+      const SyncStatusCallback& callback);
   static scoped_ptr<SyncTaskToken> CreateForForegroundTask(
       const base::WeakPtr<SyncTaskManager>& manager);
   static scoped_ptr<SyncTaskToken> CreateForBackgroundTask(
       const base::WeakPtr<SyncTaskManager>& manager,
       int64 token_id,
       scoped_ptr<BlockingFactor> blocking_factor);
 
   void UpdateTask(const tracked_objects::Location& location,
                   const SyncStatusCallback& callback);
 
   const tracked_objects::Location& location() const { return location_; }
   virtual ~SyncTaskToken();
 
   static SyncStatusCallback WrapToCallback(scoped_ptr<SyncTaskToken> token);
 
   SyncTaskManager* manager() { return manager_.get(); }
 
   const SyncStatusCallback& callback() const { return callback_; }
   void clear_callback() { callback_.Reset(); }
 
   void set_blocking_factor(scoped_ptr<BlockingFactor> blocking_factor);
   const BlockingFactor* blocking_factor() const;
   void clear_blocking_factor();
 
   int64 token_id() const { return token_id_; }
 
  private:
   SyncTaskToken(const base::WeakPtr<SyncTaskManager>& manager,
                 int64 token_id,
-                scoped_ptr<BlockingFactor> blocking_factor);
+                scoped_ptr<BlockingFactor> blocking_factor,
+                const SyncStatusCallback& callback);
 
   base::WeakPtr<SyncTaskManager> manager_;
   tracked_objects::Location location_;
   int64 token_id_;
   SyncStatusCallback callback_;
 
   scoped_ptr<BlockingFactor> blocking_factor_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncTaskToken);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_TOKEN_H_