[Merge to 49] [Downloads] Avoid resetting SecureHash state across an interruption.

content/browser/download/download_file_impl.cc

Index: content/browser/download/download_file_impl.cc
diff --git a/content/browser/download/download_file_impl.cc b/content/browser/download/download_file_impl.cc
index 0a1f39801524a98b48af41c46457daae18eb1d0d..e8e31cee7be9947d4ef043f7be2bd0ffa38587be 100644
--- a/content/browser/download/download_file_impl.cc
+++ b/content/browser/download/download_file_impl.cc
@@ -280,7 +280,10 @@ void DownloadFileImpl::StreamActive() {
               stream_reader_->GetStatus());
           SendUpdate();
           base::TimeTicks close_start(base::TimeTicks::Now());
-          file_.Finish();
+          if (reason == DOWNLOAD_INTERRUPT_REASON_NONE)
+            file_.Finish();
+          else
+            file_.FinishWithError();
           base::TimeTicks now(base::TimeTicks::Now());
           disk_writes_time_ += (now - close_start);
           RecordFileBandwidth(