Do not do unnecessary recursive deletes for files.

chrome/browser/download/download_browsertest.cc

 // 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.
 
 #include <sstream>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/files/file.h"
@@ skipping 775 matching lines @@
     if (!downloaded_path_exists)
       return false;
 
     // Check the file contents.
     size_t file_size = net::URLRequestSlowDownloadJob::kFirstDownloadSize +
                        net::URLRequestSlowDownloadJob::kSecondDownloadSize;
     std::string expected_contents(file_size, '*');
     EXPECT_TRUE(VerifyFile(download_path, expected_contents, file_size));
 
     // Delete the file we just downloaded.
-    EXPECT_TRUE(base::DieFileDie(download_path, true));
+    EXPECT_TRUE(base::DieFileDie(download_path, false));
     EXPECT_FALSE(base::PathExists(download_path));
 
     return true;
   }
 
   void GetDownloads(Browser* browser,
                     std::vector<DownloadItem*>* downloads) const {
     DCHECK(downloads);
     DownloadManager* manager = DownloadManagerForBrowser(browser);
     manager->GetAllDownloads(downloads);
@@ skipping 2867 matching lines @@
 
   scoped_ptr<content::DownloadTestObserver> observer(DangerousDownloadWaiter(
       browser(), 1, content::DownloadTestObserver::ON_DANGEROUS_DOWNLOAD_DENY));
   ui_test_utils::NavigateToURL(browser(), extension_url);
 
   observer->WaitForFinished();
 
   // Download shelf should close.
   EXPECT_FALSE(browser()->window()->IsDownloadShelfVisible());
 }