Add new UMA stats for parallelizable download

content/browser/download/parallel_download_job.cc

Index: content/browser/download/parallel_download_job.cc
diff --git a/content/browser/download/parallel_download_job.cc b/content/browser/download/parallel_download_job.cc
index 539f29be4d0b1a9d4d1d28f4dd5a267329e315ab..b6e5cae52fd879d226e9f364b090c8c2f2d94f26 100644
--- a/content/browser/download/parallel_download_job.cc
+++ b/content/browser/download/parallel_download_job.cc
@@ -26,7 +26,7 @@ ParallelDownloadJob::ParallelDownloadJob(
     DownloadItemImpl* download_item,
     std::unique_ptr<DownloadRequestHandleInterface> request_handle,
     const DownloadCreateInfo& create_info)
-    : DownloadJobImpl(download_item, std::move(request_handle)),
+    : DownloadJobImpl(download_item, std::move(request_handle), true),
       initial_request_offset_(create_info.offset),
       content_length_(create_info.total_bytes),
       requests_sent_(false),
@@ -93,10 +93,6 @@ int ParallelDownloadJob::GetMinRemainingTimeInSeconds() const {
   return GetParallelRequestRemainingTimeConfig().InSeconds();
 }
 
-bool ParallelDownloadJob::UsesParallelRequests() const {
-  return true;
-}
-
 void ParallelDownloadJob::CancelRequestWithOffset(int64_t offset) {
   if (initial_request_offset_ == offset) {
     DownloadJobImpl::Cancel(false);