Parallel download browser test.

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"
 #include "content/common/content_export.h"
 #include "content/public/browser/download_item.h"
 
 namespace content {
 
+// Finch parameter key value for minimum slice size in bytes to use parallel
+// download.
+constexpr char kMinSliceSizeFinchKey[] = "min_slice_size";
+
+// Finch parameter key value for number of parallel requests in a parallel
+// download, including the original request.
+constexpr char kParallelRequestCountFinchKey[] = "request_count";
+
+// Finch parameter key value for the delay time in milliseconds to send
+// parallel requests after response of the original request is handled.
+constexpr char kParallelRequestDelayFinchKey[] = "parallel_request_delay";
+
+// Finch parameter key value for the remaining time in seconds that is required
+// to send parallel requests.
+constexpr char kParallelRequestRemainingTimeFinchKey[] =
+    "parallel_request_remaining_time";
+
 // Chunks the content that starts from |current_offset|, into at most
 // std::max(|request_count|, 1) smaller slices.
 // Each slice contains at least |min_slice_size| bytes unless |total_length|
 // is less than |min_slice_size|.
 // The last slice is half opened.
 CONTENT_EXPORT std::vector<DownloadItem::ReceivedSlice>
 FindSlicesForRemainingContent(int64_t current_offset,
                               int64_t total_length,
                               int request_count,
                               int64_t min_slice_size);
@@ skipping 32 matching lines @@
 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);
 }  //  namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_PARALLEL_DOWNLOAD_UTILS_H_