Warn users about potentially unwanted downloads.

chrome/browser/history/download_database.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_DATABASE_H_
 #define CHROME_BROWSER_HISTORY_DOWNLOAD_DATABASE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 76 matching lines @@
   // Values used in the database for DownloadItem::DangerType
   static const int kDangerTypeInvalid;
   static const int kDangerTypeNotDangerous;
   static const int kDangerTypeDangerousFile;
   static const int kDangerTypeDangerousUrl;
   static const int kDangerTypeDangerousContent;
   static const int kDangerTypeMaybeDangerousContent;
   static const int kDangerTypeUncommonContent;
   static const int kDangerTypeUserValidated;
   static const int kDangerTypeDangerousHost;
+  static const int kDangerTypePotentiallyUnwanted;
 
   // Fixes state of the download entries. Sometimes entries with IN_PROGRESS
   // state are not updated during browser shutdown (particularly when crashing).
   // On the next start such entries are considered interrupted with
   // interrupt reason |DOWNLOAD_INTERRUPT_REASON_CRASH|.  This function
   // fixes such entries.
   void EnsureInProgressEntriesCleanedUp();
 
   bool EnsureColumnExists(const std::string& name, const std::string& type);
 
@@ skipping 15 matching lines @@
   // doing the cleanup until after any DB migration and unless we are
   // actually use the downloads database.
   bool in_progress_entry_cleanup_completed_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadDatabase);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_DOWNLOAD_DATABASE_H_