Make the download's response headers available in the DownloadItem

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 59c51ca618cba2026948ea4fb061e66851739b0d..1f6c77316d7a3248cf2632a62135cb499a00cd02 100644
--- a/content/browser/download/download_create_info.h
+++ b/content/browser/download/download_create_info.h
@@ -12,6 +12,7 @@
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
 #include "base/optional.h"
 #include "base/time/time.h"
 #include "content/browser/download/download_file.h"
@@ -24,6 +25,10 @@
 #include "ui/base/page_transition_types.h"
 #include "url/gurl.h"
 
+namespace net {
+class HttpResponseHeaders;
+}
+
 namespace content {
 
 // Used for informing the download manager of a new download, since we don't
@@ -78,6 +83,10 @@ struct CONTENT_EXPORT DownloadCreateInfo {
 
   base::Optional<ui::PageTransition> transition_type;
 
+  // The HTTP response headers. This contains a nullptr when the response has
+  // not yet been received. Only for consuming headers.
+  scoped_refptr<const net::HttpResponseHeaders> response_headers;
+
   // The remote IP address where the download was fetched from.  Copied from
   // UrlRequest::GetSocketAddress().
   std::string remote_address;