Avoid issuing a Read() after draining a request.

content/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.
 
 // This file contains download browser tests that are known to be runnable
 // in a pure content context.  Over time tests should be migrated here.
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 1779 matching lines @@
   std::vector<DownloadItem*> downloads;
   DownloadManagerForShell(shell())->GetAllDownloads(&downloads);
   ASSERT_EQ(1u, downloads.size());
 
   EXPECT_EQ(FILE_PATH_LITERAL("suggested-filename"),
             downloads[0]->GetTargetFilePath().BaseName().value());
   ASSERT_TRUE(origin_one.ShutdownAndWaitUntilComplete());
   ASSERT_TRUE(origin_two.ShutdownAndWaitUntilComplete());
 }
 
+// The file empty.bin is served with a MIME type of application/octet-stream.
+// The content body is empty. Make sure this case is handled properly and we
+// don't regress on http://crbug.com/320394.
+IN_PROC_BROWSER_TEST_F(DownloadContentTest, DownloadGZipWithNoContent) {
+  EmbeddedTestServer test_server;
+  ASSERT_TRUE(test_server.InitializeAndWaitUntilReady());
+
+  GURL url = test_server.GetURL("/empty.bin");
+  test_server.ServeFilesFromDirectory(GetTestFilePath("download", ""));
+
+  NavigateToURLAndWaitForDownload(shell(), url, DownloadItem::COMPLETE);
+  // That's it. This should work without crashing.
+}
+
 }  // namespace content