Limit parallel download to http GET requests.

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 170 matching lines @@
 
   // File size is not complied to finch configuration.
   FALLBACK_REASON_FILE_SIZE,
 
   // The HTTP connection type does not meet the requirement.
   FALLBACK_REASON_CONNECTION_TYPE,
 
   // The remaining time does not meet the requirement.
   FALLBACK_REASON_REMAINING_TIME,
 
+  // The http method or url scheme does not meet the requirement.
+  FALLBACK_REASON_HTTP_METHOD,
+
   // Last entry of the enum.
   COUNT,
 };
 
 // Increment one of the above counts.
 void RecordDownloadCount(DownloadCountTypes type);
 
 // Record initiation of a download from a specific source.
 void RecordDownloadSource(DownloadSource source);
 
@@ skipping 139 matching lines @@
                                       const std::vector<GURL>& url_chain);
 
 void RecordDownloadSourcePageTransitionType(
     const base::Optional<ui::PageTransition>& transition);
 
 void RecordDownloadHttpResponseCode(int response_code);
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_STATS_H_