[Downloads] Retry renames after transient failures.

content/public/browser/download_interrupt_reason_values.h

 // Copyright (c) 2011 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.
 
 // Note that the embedder is welcome to persist these values across
 // invocations of the browser, and possibly across browser versions.
 // Thus individual errors may be deprecated and new errors added, but
 // the values of particular errors should not be changed.
 
 // File errors.
 
 // Generic file operation failure.
 // "File Error".
 INTERRUPT_REASON(FILE_FAILED, 1)
 
 // The file cannot be accessed due to security restrictions.
-// The file cannot be accessed.
 // "Access Denied".
 INTERRUPT_REASON(FILE_ACCESS_DENIED, 2)
 
 // There is not enough room on the drive.
 // "Disk Full".
 INTERRUPT_REASON(FILE_NO_SPACE, 3)
 
 // The directory or file name is too long.
 // "Path Too Long".
 INTERRUPT_REASON(FILE_NAME_TOO_LONG, 5)
@@ skipping 82 matching lines @@
 // The user shut down the browser.
 // Internal use only:  resume pending downloads if possible.
 INTERRUPT_REASON(USER_SHUTDOWN, 41)
 
 
 // Crash.
 
 // The browser crashed.
 // Internal use only:  resume pending downloads if possible.
 INTERRUPT_REASON(CRASH, 50)