Add mime type information to the download database

chrome/browser/history/download_row.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 CHROME_BROWSER_HISTORY_DOWNLOAD_ROW_H_
 #define CHROME_BROWSER_HISTORY_DOWNLOAD_ROW_H_
 
+#include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/time/time.h"
 #include "content/public/browser/download_danger_type.h"
 #include "content/public/browser/download_interrupt_reasons.h"
 #include "content/public/browser/download_item.h"
 #include "url/gurl.h"
 
 namespace history {
 
 // Contains the information that is stored in the download system's persistent
 // store (or refers to it). DownloadHistory uses this to communicate with the
 // DownloadDatabase through the HistoryService.
 struct DownloadRow {
   DownloadRow();
   DownloadRow(
       const base::FilePath& current_path,
       const base::FilePath& target_path,
       const std::vector<GURL>& url_chain,
       const GURL& referrer,
+      const std::string& mime_type,
+      const std::string& original_mime_type,
       const base::Time& start,
       const base::Time& end,
       const std::string& etag,
       const std::string& last_modified,
       int64 received,
       int64 total,
       content::DownloadItem::DownloadState download_state,
       content::DownloadDangerType danger_type,
       content::DownloadInterruptReason interrupt_reason,
       uint32 id,
@@ skipping 11 matching lines @@
 
   // The URL redirect chain through which we are downloading.  The front
   // is the url that the initial request went to, and the back is the
   // url from which we ended up getting data.  This is not changed by
   // UpdateDownload().
   std::vector<GURL> url_chain;
 
   // The URL that referred us. Is not changed by UpdateDownload().
   GURL referrer_url;
 
+  // The mime type of the download, might be based on heuristics.
+  std::string mime_type;
+
+  // The originial mime type of the download.
+  std::string original_mime_type;
+
   // The time when the download started. Is not changed by UpdateDownload().
   base::Time start_time;
 
   // The time when the download completed.
   base::Time end_time;
 
   // Contents of most recently seen ETag header.
   std::string etag;
 
   // Contents of most recently seen Last-Modified header.
@@ skipping 23 matching lines @@
   bool opened;
 
   // The id and name of the extension that created this download.
   std::string by_ext_id;
   std::string by_ext_name;
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_DOWNLOAD_ROW_H_