Test downloads.download() disallows unsafe headers

chrome/browser/download/download_hidden.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_DOWNLOAD_DOWNLOAD_HIDDEN_H_
+#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_HIDDEN_H_
+
+#include "content/public/browser/download_item.h"
+
+// Clients may add a DownloadHidden to a DownloadItem in order to prevent the UI
+// from displaying this DownloadItem.
+class DownloadHidden : public content::DownloadItem::ExternalData {
+ public:
+  static bool Get(content::DownloadItem* download_item);
+
+  explicit DownloadHidden(content::DownloadItem* download_item);
+  virtual ~DownloadHidden();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DownloadHidden);
+};
+
+#endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_HIDDEN_H_