Don't prompt to save malicious downloads on exit

content/public/browser/download_manager.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.
 //
 // The DownloadManager object manages the process of downloading, including
 // updates to the history system and providing the information for displaying
 // the downloads view in the Destinations tab. There is one DownloadManager per
 // active browser context in Chrome.
 //
 // Download observers:
@@ skipping 140 matching lines @@
       DownloadItem::DownloadState state,
       DownloadDangerType danger_type,
       DownloadInterruptReason interrupt_reason,
       bool opened) = 0;
 
   // The number of in progress (including paused) downloads.
   // Performance note: this loops over all items. If profiling finds that this
   // is too slow, use an AllDownloadItemNotifier to count in-progress items.
   virtual int InProgressCount() const = 0;
 
+  // The number of in progress (including paused) downloads.
+  // Performance note: this loops over all items. If profiling finds that this
+  // is too slow, use an AllDownloadItemNotifier to count in-progress items.
+  // This excludes downloads that are marked as malicious.
+  virtual int NonMaliciousInProgressCount() const = 0;
+
   virtual BrowserContext* GetBrowserContext() const = 0;
 
   // Checks whether downloaded files still exist. Updates state of downloads
   // that refer to removed files. The check runs in the background and may
   // finish asynchronously after this method returns.
   virtual void CheckForHistoryFilesRemoval() = 0;
 
   // Get the download item for |id| if present, no matter what type of download
   // it is or state it's in.
   virtual DownloadItem* GetDownload(uint32 id) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_H_