Clear the received slices in DownloadItemImpl when etag changed.

content/browser/download/download_file_factory.cc

Index: content/browser/download/download_file_factory.cc
diff --git a/content/browser/download/download_file_factory.cc b/content/browser/download/download_file_factory.cc
index 2ab7a7bfdefa82a84a9e0dfa78f77aabdd556707..393da35a01c5e412200e224556befc7ecdededea 100644
--- a/content/browser/download/download_file_factory.cc
+++ b/content/browser/download/download_file_factory.cc
@@ -16,12 +16,10 @@ DownloadFile* DownloadFileFactory::CreateFile(
     std::unique_ptr<DownloadSaveInfo> save_info,
     const base::FilePath& default_downloads_directory,
     std::unique_ptr<ByteStreamReader> byte_stream,
-    const std::vector<DownloadItem::ReceivedSlice>& received_slices,
     const net::NetLogWithSource& net_log,
     base::WeakPtr<DownloadDestinationObserver> observer) {
   return new DownloadFileImpl(std::move(save_info), default_downloads_directory,
-                              std::move(byte_stream), received_slices, net_log,
-                              observer);
+                              std::move(byte_stream), net_log, observer);
 }
 
 }  // namespace content