[SyncFS] Rename BlockingFactor to TaskBlocker

chrome/browser/sync_file_system/drive_backend/sync_task.cc

 // 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.
 
 #include "chrome/browser/sync_file_system/drive_backend/sync_task.h"
 
 #include "base/bind.h"
 #include "chrome/browser/sync_file_system/drive_backend/sync_task_manager.h"
 #include "chrome/browser/sync_file_system/drive_backend/sync_task_token.h"
 #include "chrome/browser/sync_file_system/drive_backend/task_dependency_manager.h"
 
 namespace sync_file_system {
 namespace drive_backend {
 
 namespace {
 
 void CallRunExclusive(const base::WeakPtr<ExclusiveTask>& task,
                       scoped_ptr<SyncTaskToken> token) {
   if (task)
     task->RunExclusive(SyncTaskToken::WrapToCallback(token.Pass()));
 }
 
 }  // namespace
 
 ExclusiveTask::ExclusiveTask() : weak_ptr_factory_(this) {}
 ExclusiveTask::~ExclusiveTask() {}
 
 void ExclusiveTask::RunPreflight(scoped_ptr<SyncTaskToken> token) {
-  scoped_ptr<BlockingFactor> blocking_factor(new BlockingFactor);
-  blocking_factor->exclusive = true;
+  scoped_ptr<TaskBlocker> task_blocker(new TaskBlocker);
+  task_blocker->exclusive = true;
 
-  SyncTaskManager::UpdateBlockingFactor(
-      token.Pass(), blocking_factor.Pass(),
+  SyncTaskManager::UpdateTaskBlocker(
+      token.Pass(), task_blocker.Pass(),
       base::Bind(&CallRunExclusive, weak_ptr_factory_.GetWeakPtr()));
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system