Handle the case where IAttachmentExecute::Save() deletes a downloaded file.

content/browser/download/base_file.h

Index: content/browser/download/base_file.h
diff --git a/content/browser/download/base_file.h b/content/browser/download/base_file.h
index e6ae0a3164e8f8578645445d49bb1f937aec58c7..c138636a338ebb6466d9eda9854691b13ed689b0 100644
--- a/content/browser/download/base_file.h
+++ b/content/browser/download/base_file.h
@@ -72,8 +72,9 @@ class CONTENT_EXPORT BaseFile {
   // Indicate that the download has finished. No new data will be received.
   void Finish();
 
-  // Informs the OS that this file came from the internet.
-  void AnnotateWithSourceInformation();
+  // Informs the OS that this file came from the internet. Returns a
+  // DownloadInterruptReason indicating the result of the operation.
+  content::DownloadInterruptReason AnnotateWithSourceInformation();
 
   // Calculate and return the current speed in bytes per second.
   int64 CurrentSpeed() const;