Componentize StartupTaskRunnerService

components/bookmarks/browser/startup_task_runner_service.cc

 // Copyright (c) 2013 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/profiles/startup_task_runner_service.h"
+#include "components/bookmarks/browser/startup_task_runner_service.h"
 
 #include "base/deferred_sequenced_task_runner.h"
 #include "base/logging.h"
-#include "chrome/browser/profiles/profile.h"
+#include "base/sequenced_task_runner.h"
 
-StartupTaskRunnerService::StartupTaskRunnerService(Profile* profile)
-    : profile_(profile) {
+StartupTaskRunnerService::StartupTaskRunnerService(
+    const scoped_refptr<base::SequencedTaskRunner>& io_task_runner)
+    : io_task_runner_(io_task_runner) {
+  DCHECK(io_task_runner_);
 }
 
 StartupTaskRunnerService::~StartupTaskRunnerService() {
 }
 
 scoped_refptr<base::DeferredSequencedTaskRunner>
     StartupTaskRunnerService::GetBookmarkTaskRunner() {
   DCHECK(CalledOnValidThread());
-  if (!bookmark_task_runner_.get()) {
+  if (!bookmark_task_runner_) {
     bookmark_task_runner_ =
-        new base::DeferredSequencedTaskRunner(profile_->GetIOTaskRunner());
+        new base::DeferredSequencedTaskRunner(io_task_runner_);
   }
   return bookmark_task_runner_;
 }
 
 void StartupTaskRunnerService::StartDeferredTaskRunners() {
   GetBookmarkTaskRunner()->Start();
 }