Add new UMA stats for parallelizable download

content/browser/download/parallel_download_utils.cc

Index: content/browser/download/parallel_download_utils.cc
diff --git a/content/browser/download/parallel_download_utils.cc b/content/browser/download/parallel_download_utils.cc
index 40f4397a10533a3ff559bdcd1b1e4d69cf732a4a..1e3d900bcd4b87f8e35f722c1c36a75054328af4 100644
--- a/content/browser/download/parallel_download_utils.cc
+++ b/content/browser/download/parallel_download_utils.cc
@@ -167,7 +167,7 @@ void DebugSlicesInfo(const DownloadItem::ReceivedSlices& slices) {
   }
 }
 
-CONTENT_EXPORT int64_t GetMaxContiguousDataBlockSizeFromBeginning(
+int64_t GetMaxContiguousDataBlockSizeFromBeginning(
     const DownloadItem::ReceivedSlices& slices) {
   std::vector<DownloadItem::ReceivedSlice>::const_iterator iter =
       slices.begin();
@@ -180,4 +180,8 @@ CONTENT_EXPORT int64_t GetMaxContiguousDataBlockSizeFromBeginning(
   return size;
 }
 
+bool IsParallelDownloadEnabled() {
+  return base::FeatureList::IsEnabled(features::kParallelDownloading);
+}
+
 }  // namespace content