[downloads] Correctly plumb client ID for download file scanning.

content/browser/download/download_manager_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_MANAGER_IMPL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 171 matching lines @@
   // Overridden from DownloadItemImplDelegate
   // (Note that |GetBrowserContext| are present in both interfaces.)
   void DetermineDownloadTarget(DownloadItemImpl* item,
                                const DownloadTargetCallback& callback) override;
   bool ShouldCompleteDownload(DownloadItemImpl* item,
                               const base::Closure& complete_callback) override;
   bool ShouldOpenFileBasedOnExtension(const base::FilePath& path) override;
   bool ShouldOpenDownload(DownloadItemImpl* item,
                           const ShouldOpenDownloadCallback& callback) override;
   void CheckForFileRemoval(DownloadItemImpl* download_item) override;
+  std::string GetApplicationClientIdForFileScanning() const override;
   void ResumeInterruptedDownload(
       std::unique_ptr<content::DownloadUrlParameters> params,
       uint32_t id) override;
   void OpenDownload(DownloadItemImpl* download) override;
   void ShowDownloadInShell(DownloadItemImpl* download) override;
   void DownloadRemoved(DownloadItemImpl* download) override;
 
   void AddUrlDownloader(
       std::unique_ptr<UrlDownloader, BrowserThread::DeleteOnIOThread>
           downloader);
@@ skipping 36 matching lines @@
       url_downloaders_;
 
   base::WeakPtrFactory<DownloadManagerImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadManagerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_IMPL_H_