Add new UMA stats for parallelizable download

content/browser/download/download_job_impl.cc

Index: content/browser/download/download_job_impl.cc
diff --git a/content/browser/download/download_job_impl.cc b/content/browser/download/download_job_impl.cc
index c5239e867cc6b590e057bd5a3995a6d62778f6dd..82b6ed86c648921a6ed0acd518ee96f9369365bb 100644
--- a/content/browser/download/download_job_impl.cc
+++ b/content/browser/download/download_job_impl.cc
@@ -10,8 +10,11 @@ namespace content {
 
 DownloadJobImpl::DownloadJobImpl(
     DownloadItemImpl* download_item,
-    std::unique_ptr<DownloadRequestHandleInterface> request_handle)
-    : DownloadJob(download_item), request_handle_(std::move(request_handle)) {}
+    std::unique_ptr<DownloadRequestHandleInterface> request_handle,
+    bool is_parallizable)
+    : DownloadJob(download_item),
+      request_handle_(std::move(request_handle)),
+      is_parallizable_(is_parallizable) {}
 
 DownloadJobImpl::~DownloadJobImpl() = default;
 
@@ -43,4 +46,8 @@ WebContents* DownloadJobImpl::GetWebContents() const {
   return request_handle_ ? request_handle_->GetWebContents() : nullptr;
 }
 
+bool DownloadJobImpl::IsParallelizable() const {
+  return is_parallizable_;
+}
+
 }  // namespace content