[Downloads] Consolidate MOTW annotation APIs into a single API.

content/browser/download/download_stats.h

 // 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.
 //
 // Holds helpers for gathering UMA stats about downloads.
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_STATS_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_STATS_H_
 
 #include <stddef.h>
@@ skipping 52 matching lines @@
   // Counts interruptions that happened at the end of the download.
   INTERRUPTED_AT_END_COUNT,
 
   // Counts errors due to writes to BaseFiles that have been detached already.
   // This can happen when saving web pages as complete packages. It happens
   // when we get messages to append data to files that have already finished and
   // been detached, but haven't yet been removed from the list of files in
   // progress.
   APPEND_TO_DETACHED_FILE_COUNT,
 
-  // Counts the number of instances where the downloaded file is missing after a
-  // successful invocation of ScanAndSaveDownloadedFile().
-  FILE_MISSING_AFTER_SUCCESSFUL_SCAN_COUNT,
+  // (Deprecated) Counts the number of instances where the downloaded file is
+  // missing after a successful invocation of ScanAndSaveDownloadedFile().
+  DOWNLOAD_COUNT_UNUSED_14,
 
   // (Deprecated) Count of downloads with a strong ETag and specified
   // 'Accept-Ranges: bytes'.
   DOWNLOAD_COUNT_UNUSED_15,
 
   // Count of downloads that didn't have a valid WebContents at the time it was
   // interrupted.
   INTERRUPTED_WITHOUT_WEBCONTENTS,
 
   // Count of downloads that supplies a strong validator (implying byte-wise
@@ skipping 159 matching lines @@
 
 // Record the state of the origin information across a download resumption
 // request. |state| is a combination of values from OriginStateOnResumption
 // enum.
 void RecordOriginStateOnResumption(bool is_partial,
                                    int state);
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_STATS_H_