[Downloads] Always call DM::StartDownload() for explicit downloads.

content/browser/download/download_create_info.h

Index: content/browser/download/download_create_info.h
diff --git a/content/browser/download/download_create_info.h b/content/browser/download/download_create_info.h
index e032fbf293d874245faa2b7c87e70d2950b00b3b..886fe266cdc0bb12eb4628ce704f2730b5312ee5 100644
--- a/content/browser/download/download_create_info.h
+++ b/content/browser/download/download_create_info.h
@@ -14,6 +14,7 @@
 #include "content/browser/download/download_file.h"
 #include "content/browser/download/download_request_handle.h"
 #include "content/common/content_export.h"
+#include "content/public/browser/download_interrupt_reasons.h"
 #include "content/public/browser/download_save_info.h"
 #include "content/public/common/page_transition_types.h"
 #include "net/base/net_log.h"
@@ -88,6 +89,10 @@ struct CONTENT_EXPORT DownloadCreateInfo {
   // The handle to the URLRequest sourcing this download.
   DownloadRequestHandle request_handle;
 
+  // Contains the download interrupt reason if the download started in a failed
+  // state. Otherwise contains DOWNLOAD_INTERRUPT_REASON_NONE.
+  DownloadInterruptReason interrupt_reason;
+
   // The request's |BoundNetLog|, for "source_dependency" linking with the
   // download item's.
   const net::BoundNetLog request_bound_net_log;