Downloads: replace BrowserThread::FILE with task scheduler.

content/browser/download/download_file_unittest.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 <stddef.h>
 #include <stdint.h>
 
 #include <utility>
 #include <vector>
 
@@ skipping 709 matching lines @@
                                   DownloadInterruptReason interrupt_reason,
                                   const base::FilePath& new_path) {
   EXPECT_EQ(DOWNLOAD_INTERRUPT_REASON_NONE, interrupt_reason);
   *did_run_callback = true;
   closure.Run();
 }
 
 }  // namespace
 
 // Test that the retry logic works. This test assumes that DownloadFileImpl will
-// post tasks to the current message loop (acting as the FILE thread)
+// post tasks to the current message loop (acting as the download sequence)
 // asynchronously to retry the renames. We will stuff RunLoop::QuitClosures()
 // in between the retry tasks to stagger them and then allow the rename to
 // succeed.
 //
 // Note that there is only one queue of tasks to run, and that is in the tests'
 // base::MessageLoop::current(). Each RunLoop processes that queue until it sees
 // a QuitClosure() targeted at itself, at which point it stops processing.
 TEST_P(DownloadFileTestWithRename, RenameWithErrorRetry) {
   ASSERT_TRUE(CreateDownloadFile(0, true));
   base::FilePath initial_path(download_file_->FullPath());
@@ skipping 311 matching lines @@
       std::unique_ptr<MockByteStreamReader>(additional_streams_[0]), 0,
       DownloadSaveInfo::kLengthFullContent);
 
   // The stream should get terminated and reset the callback.
   EXPECT_TRUE(sink_callback_.is_null());
   download_file_->Cancel();
   DestroyDownloadFile(0, false);
 }
 
 }  // namespace content