Replace BrowserThread::FILE in safe browsing with task scheduler.

chrome/browser/safe_browsing/download_feedback_unittest.cc

Index: chrome/browser/safe_browsing/download_feedback_unittest.cc
diff --git a/chrome/browser/safe_browsing/download_feedback_unittest.cc b/chrome/browser/safe_browsing/download_feedback_unittest.cc
index f18adfeb6b66f1eaf1741c03fe52aed88b2413a4..8bd291ff7706fc12ea0bb6a04e1903a906d10a7b 100644
--- a/chrome/browser/safe_browsing/download_feedback_unittest.cc
+++ b/chrome/browser/safe_browsing/download_feedback_unittest.cc
@@ -10,10 +10,12 @@
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
+#include "base/task_scheduler/post_task.h"
 #include "chrome/browser/safe_browsing/two_phase_uploader.h"
 #include "components/safe_browsing/csd.pb.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/test_browser_thread_bundle.h"
+#include "content/public/test/test_utils.h"
 #include "net/traffic_annotation/network_traffic_annotation_test_helper.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -104,8 +106,8 @@ std::unique_ptr<TwoPhaseUploader> FakeUploaderFactory::CreateTwoPhaseUploader(
 class DownloadFeedbackTest : public testing::Test {
  public:
   DownloadFeedbackTest()
-      : file_task_runner_(content::BrowserThread::GetTaskRunnerForThread(
-            content::BrowserThread::FILE)),
+      : file_task_runner_(base::CreateSequencedTaskRunnerWithTraits(
+            {base::MayBlock(), base::TaskPriority::BACKGROUND})),
         io_task_runner_(content::BrowserThread::GetTaskRunnerForThread(
             content::BrowserThread::IO)),
         url_request_context_getter_(
@@ -140,7 +142,7 @@ class DownloadFeedbackTest : public testing::Test {
   base::FilePath upload_file_path_;
   std::string upload_file_data_;
   content::TestBrowserThreadBundle thread_bundle_;
-  scoped_refptr<base::SingleThreadTaskRunner> file_task_runner_;
+  scoped_refptr<base::SequencedTaskRunner> file_task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
   FakeUploaderFactory two_phase_uploader_factory_;
   scoped_refptr<net::TestURLRequestContextGetter> url_request_context_getter_;
@@ -187,7 +189,7 @@ TEST_F(DownloadFeedbackTest, CompleteUpload) {
       TwoPhaseUploader::STATE_SUCCESS, net::OK, 0, "");
   EXPECT_TRUE(feedback_finish_called_);
   feedback.reset();
-  base::RunLoop().RunUntilIdle();
+  content::RunAllBlockingPoolTasksUntilIdle();
   EXPECT_FALSE(base::PathExists(upload_file_path_));
 }
 
@@ -219,7 +221,7 @@ TEST_F(DownloadFeedbackTest, CancelUpload) {
   feedback.reset();
   EXPECT_FALSE(feedback_finish_called_);
 
-  base::RunLoop().RunUntilIdle();
+  content::RunAllBlockingPoolTasksUntilIdle();
   EXPECT_FALSE(base::PathExists(upload_file_path_));
 }