TaskScheduler Migration for DownloadProtectionService.

chrome/browser/safe_browsing/download_protection_service.cc

 // 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.
 
 #include "chrome/browser/safe_browsing/download_protection_service.h"
 
 #include <stddef.h>
 
 #include <memory>
 
@@ skipping 12 matching lines @@
 #include "base/scoped_observer.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "base/sha1.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/task/cancelable_task_tracker.h"
 #include "base/task_scheduler/post_task.h"
+#include "base/task_scheduler/task_traits.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/history/history_service_factory.h"
 #include "chrome/browser/metrics/chrome_metrics_service_accessor.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/safe_browsing/download_feedback_service.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
@@ skipping 1598 matching lines @@
 };
 
 DownloadProtectionService::DownloadProtectionService(
     SafeBrowsingService* sb_service)
     : navigation_observer_manager_(nullptr),
       request_context_getter_(sb_service ? sb_service->url_request_context()
                                          : nullptr),
       enabled_(false),
       binary_feature_extractor_(new BinaryFeatureExtractor()),
       download_request_timeout_ms_(kDownloadRequestTimeoutMs),
-      feedback_service_(
-          new DownloadFeedbackService(request_context_getter_.get(),
-                                      BrowserThread::GetBlockingPool())),
+      feedback_service_(new DownloadFeedbackService(
+          request_context_getter_.get(),
+          base::CreateSequencedTaskRunnerWithTraits(
+              {base::MayBlock(), base::TaskPriority::BACKGROUND})
+              .get())),
       whitelist_sample_rate_(kWhitelistDownloadSampleRate) {
   if (sb_service) {
     ui_manager_ = sb_service->ui_manager();
     database_manager_ = sb_service->database_manager();
     navigation_observer_manager_ = sb_service->navigation_observer_manager();
     ParseManualBlacklistFlag();
   }
 }
 
 DownloadProtectionService::~DownloadProtectionService() {
@@ skipping 318 matching lines @@
           out_request->mutable_referrer_chain());
   UMA_HISTOGRAM_COUNTS_100(
       "SafeBrowsing.ReferrerURLChainSize.PPAPIDownloadAttribution",
       out_request->referrer_chain_size());
   UMA_HISTOGRAM_ENUMERATION(
       "SafeBrowsing.ReferrerAttributionResult.PPAPIDownloadAttribution", result,
       SafeBrowsingNavigationObserverManager::ATTRIBUTION_FAILURE_TYPE_MAX);
 }
 
 }  // namespace safe_browsing