[PPAPI] Quarantine files that are writeable by a Pepper plugin.

content/browser/download/quarantine_constants_linux.h

Index: content/browser/download/quarantine_constants_linux.h
diff --git a/content/browser/download/quarantine_constants_linux.h b/content/browser/download/quarantine_constants_linux.h
deleted file mode 100644
index cab867beb65292bb2ee0efe26baa1b45666f6b83..0000000000000000000000000000000000000000
--- a/content/browser/download/quarantine_constants_linux.h
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2016 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_QUARANTINE_CONSTANTS_LINUX_H_
-#define CONTENT_BROWSER_DOWNLOAD_QUARANTINE_CONSTANTS_LINUX_H_
-
-#include "content/common/content_export.h"
-
-namespace content {
-
-// Attribute names to be used with setxattr and friends.
-//
-// The source URL attribute is part of the XDG standard.
-// The referrer URL attribute is not part of the XDG standard,
-// but it is used to keep the naming consistent.
-// http://freedesktop.org/wiki/CommonExtendedAttributes
-CONTENT_EXPORT extern const char kSourceURLExtendedAttrName[];
-CONTENT_EXPORT extern const char kReferrerURLExtendedAttrName[];
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_DOWNLOAD_QUARANTINE_CONSTANTS_LINUX_H_