Make the download's response headers available in the DownloadItem

content/browser/download/download_item_impl.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_ITEM_IMPL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 112 matching lines @@
   bool CanResume() const override;
   bool IsDone() const override;
   const GURL& GetURL() const override;
   const std::vector<GURL>& GetUrlChain() const override;
   const GURL& GetOriginalUrl() const override;
   const GURL& GetReferrerUrl() const override;
   const GURL& GetSiteUrl() const override;
   const GURL& GetTabUrl() const override;
   const GURL& GetTabReferrerUrl() const override;
   std::string GetSuggestedFilename() const override;
+  const scoped_refptr<const net::HttpResponseHeaders>& GetResponseHeaders()
+      const override;
   std::string GetContentDisposition() const override;
   std::string GetMimeType() const override;
   std::string GetOriginalMimeType() const override;
   std::string GetRemoteAddress() const override;
   bool HasUserGesture() const override;
   ui::PageTransition GetTransitionType() const override;
   const std::string& GetLastModifiedTime() const override;
   const std::string& GetETag() const override;
   bool IsSavePackageDownload() const override;
   const base::FilePath& GetFullPath() const override;
@@ skipping 418 matching lines @@
   // If non-empty, contains an externally supplied path that should be used as
   // the target path.
   base::FilePath forced_file_path_;
 
   // Page transition that triggerred the download.
   ui::PageTransition transition_type_ = ui::PAGE_TRANSITION_LINK;
 
   // Whether the download was triggered with a user gesture.
   bool has_user_gesture_ = false;
 
-  // Information from the request.
+  // Information from the response.
+
+  // 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_;
+
   // Content-disposition field from the header.
   std::string content_disposition_;
 
   // Mime-type from the header.  Subject to change.
   std::string mime_type_;
 
   // The value of the content type header sent with the downloaded item.  It
   // may be different from |mime_type_|, which may be set based on heuristics
   // which may look at the file extension and first few bytes of the file.
   std::string original_mime_type_;
@@ skipping 122 matching lines @@
   std::unique_ptr<DownloadJob> job_;
 
   base::WeakPtrFactory<DownloadItemImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_H_