set content length limit if half open range request fails

content/browser/download/download_job.cc

Index: content/browser/download/download_job.cc
diff --git a/content/browser/download/download_job.cc b/content/browser/download/download_job.cc
index c527014d189feab81144c923095b97dc493e3c7a..763e8edb04ef371d2e9326d0b435637dcde445de 100644
--- a/content/browser/download/download_job.cc
+++ b/content/browser/download/download_job.cc
@@ -51,6 +51,17 @@ bool DownloadJob::AddByteStream(std::unique_ptr<ByteStreamReader> stream_reader,
   return true;
 }
 
+void DownloadJob::SetPotentialFileLength(int64_t length) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  DownloadFile* download_file = download_item_->download_file_.get();
+  if (download_file) {
+    BrowserThread::PostTask(
+        BrowserThread::FILE, FROM_HERE,
+        base::Bind(&DownloadFile::SetPotentialFileLength,
+                   base::Unretained(download_file), length));
+  }
+}
+
 bool DownloadJob::UsesParallelRequests() const {
   return false;
 }