Make the download's response headers available in the DownloadItem

content/browser/download/download_create_info.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_CREATE_INFO_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_CREATE_INFO_H_
 
 #include <stdint.h>
 
 #include <string>
 #include <vector>
 
 #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"
 #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 "net/http/http_response_info.h"
 #include "net/log/net_log_with_source.h"
 #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
 // want to pass |DownloadItem|s between threads.
 struct CONTENT_EXPORT DownloadCreateInfo {
   DownloadCreateInfo(const base::Time& start_time,
                      const net::NetLogWithSource& net_log,
                      std::unique_ptr<DownloadSaveInfo> save_info);
   DownloadCreateInfo();
   ~DownloadCreateInfo();
@@ skipping 34 matching lines @@
 
   // True if the download was initiated by user action.
   bool has_user_gesture;
 
   // Whether the download should be transient. A transient download is
   // short-lived and is not shown in the UI.
   bool transient;
 
   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;
 
   // If the download is initially created in an interrupted state (because the
   // response was in error), then |result| would be something other than
   // INTERRUPT_REASON_NONE.
   DownloadInterruptReason result;
 
   // The download file save info.
@@ skipping 36 matching lines @@
   // The HTTP connection type.
   net::HttpResponseInfo::ConnectionInfo connection_info;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DownloadCreateInfo);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_CREATE_INFO_H_