Add new UMA stats for parallelizable download

content/browser/download/parallel_download_utils.h

 // Copyright 2017 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.
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_PARALLEL_DOWNLOAD_UTILS_H_
 #define CONTENT_BROWSER_DOWNLOAD_PARALLEL_DOWNLOAD_UTILS_H_
 
 #include <vector>
 
 #include "content/browser/download/download_create_info.h"
@@ skipping 44 matching lines @@
 CONTENT_EXPORT base::TimeDelta GetParallelRequestRemainingTimeConfig();
 
 // Print the states of received slices for debugging.
 CONTENT_EXPORT void DebugSlicesInfo(const DownloadItem::ReceivedSlices& slices);
 
 // Given an ordered array of slices, get the maximum size of a contiguous data
 // block that starts from offset 0. If the first slice doesn't start from offset
 // 0, return 0.
 CONTENT_EXPORT int64_t GetMaxContiguousDataBlockSizeFromBeginning(
     const DownloadItem::ReceivedSlices& slices);
+
+// Returns whether parallel download is enabled.
+CONTENT_EXPORT bool IsParallelDownloadEnabled();
+
 }  //  namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_PARALLEL_DOWNLOAD_UTILS_H_