Glue parallel download job and download file together.

content/browser/download/mock_download_item_impl.cc

Index: content/browser/download/mock_download_item_impl.cc
diff --git a/content/browser/download/mock_download_item_impl.cc b/content/browser/download/mock_download_item_impl.cc
index 621c7f8aee23ccc173ec32c74d1553186ab71131..3141051553d1de4558a8068464fcff85b0ec67d0 100644
--- a/content/browser/download/mock_download_item_impl.cc
+++ b/content/browser/download/mock_download_item_impl.cc
@@ -6,7 +6,9 @@
 
 namespace content {
 
-MockDownloadItemImpl::MockDownloadItemImpl(DownloadItemImplDelegate* delegate)
+MockDownloadItemImpl::MockDownloadItemImpl(
+    DownloadItemImplDelegate* delegate,
+    const DownloadItem::ReceivedSlices& received_slices)
     : DownloadItemImpl(delegate,
                        std::string("7d122682-55b5-4a47-a253-36cadc3e5bee"),
                        content::DownloadItem::kInvalidId,
@@ -31,9 +33,12 @@ MockDownloadItemImpl::MockDownloadItemImpl(DownloadItemImplDelegate* delegate)
                        DOWNLOAD_INTERRUPT_REASON_NONE,
                        false,
                        base::Time(),
-                       std::vector<DownloadItem::ReceivedSlice>(),
+                       received_slices,
                        net::NetLogWithSource()) {}
 
+MockDownloadItemImpl::MockDownloadItemImpl(DownloadItemImplDelegate* delegate)
+    : MockDownloadItemImpl(delegate, DownloadItem::ReceivedSlices()) {}
+
 MockDownloadItemImpl::~MockDownloadItemImpl() = default;
 
 }  // namespace content